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  • 1980-1984  (992)
  • 1965-1969
  • 1981  (992)
  • Analytical Chemistry and Spectroscopy  (963)
  • Gas chromatography  (89)
  • Nuclear reactions
Source
Material
Years
  • 1980-1984  (992)
  • 1965-1969
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Effects of pargyline and SKF-525A on brain N,N-dimethyltryptamine concentrations and hyperactivity in mice (1981)
    Springer
    Psychopharmacology 75 (1981), S. 179-183 
    Details
    ISSN: 1432-2072
    Keywords: DMT ; Gas chromatography ; Hyperactivity ; Pargyline ; SKF-525A ; Mice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Mice pretreated with the monoamine oxidase inhibitor pargyline showed a dose-dependent increase in hyperactivity for up to 2 h following injections of N,N-dimethyltryptamine (DMT: 0.5–8.0 mg/kg). Hyperactivity was related to a linear increase in whole brain concentrations of DMT as measured by a new sensitive gas chromatographic assay. The duration of this behaviour paralleled the concentration of DMT in the brain from 15–120 min. However, at 15 min, there was no significant difference in brain DMT concentrations between mice receiving pargyline and those given distilled water at the two dose levels of DMT studied (2.0 and 8.0 mg/kg). Pre-treatment with the microsomal enzyme inhibitor SKF-525A, alone or in combination with pargyline, had no effect on the DMT-induced behaviour or on the brain levels of DMT.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00432184
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  • 2
    Electronic Resource
    Electronic Resource
    Measurement of the urinary metabolites of n-hexane, cyclohexane and their isomers by gas chromatography (1981)
    Springer
    International archives of occupational and environmental health 48 (1981), S. 99-106 
    Details
    ISSN: 1432-1246
    Keywords: Urine analysis metabolites ; Gas chromatography ; Hexane ; Cyclohexane ; Biological monitoring
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A gas chromatographic method for analyzing the urinary metabolites of n-hexane (2-hexanol, 2,5-hexanedione, 2,5-dimethylfuran and γ-valerolactone), of 2-methylpentane (2-methyl-2-pentanol), of 3-methylpentane (3-methyl-2-pentanol), and of cyclohexane (cyclohexanol) was developed. Processing of urine and the gas chromatographic conditions are described. The recovery rate of all hexane metabolites, except 2,5-dimethylfuran, ranged between 92 and 100%. The variation coefficient of metabolites determination was between 1.5 and 5%, apart from 2,5-dimethylfuran determination for which the variation coefficient was 15%. The detection limits ranged between 0.2 and 0.7 mg/1 and between 0.05 and 0.1 mg/1 when a packed or capillary column was used. Results obtained from a packed and capillary column are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00405936
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  • 3
    Electronic Resource
    Electronic Resource
    Internal standardization in the head space analysis of organic solvents in blood (1981)
    Springer
    International archives of occupational and environmental health 49 (1981), S. 115-123 
    Details
    ISSN: 1432-1246
    Keywords: Blood analysis of solvents ; Gas chromatography ; Head space ; Toxicokinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The determination of toluene, benzene, ethylbenzene and trichloro-ethylene in blood by means of a gas chromatographic head space technique is presented. Internal standards are added to the blood samples in the form of water solutions of volatile hydrocarbons in proportion 2:1. This enables application of the internal standard within the broad range of concentrations and in addition increases significantly the concentrations of investigated compounds in the gas phase of incubation vessel. Elaborated methods were applied for determinations of ethylbenzene in blood samples collected after experimental inhalation exposure and for evaluation of the rate of disappearance of benzene, toluene and trichloro-ethylene from blood after acute accidental or suicidal intoxications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00377664
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  • 4
    Electronic Resource
    Electronic Resource
    Occupational exposure to hexachlorocyclohexane (1981)
    Springer
    International archives of occupational and environmental health 48 (1981), S. 319-324 
    Details
    ISSN: 1432-1246
    Keywords: Chlorophenols ; Gas chromatography ; Hexachlorocyclohexane ; Metabolites
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A sensitive and specific gas chromatographic method is described for the simultaneous determination of ten chlorinated phenols that appear in the urine of persons exposed to hexachlorocyclohexane (HCH). The phenolic compounds in the urinary samples are hydrolysed in an acidic medium and derivatised with acetic anhydride. This sample treatment permits routine application. The stationary phase (8% DC 200 on Chromosorb G AW-DMCS possesses a high separating capability for the acetic esters of the chlorophenols. The detection limits lie between 4.9 and 18.6 μg/l and allow determinations even in the environmentally interesting concentration range. The recoveries determined using aqueous standards range between 87 and 119% and the relative standard deviations are between 4.4 and 10.1%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00378679
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  • 5
    Electronic Resource
    Electronic Resource
    3-methoxytyramine: Its suitability as an indicator of synaptic dopamine release (1981)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 315 (1981), S. 219-225 
    Details
    ISSN: 1432-1912
    Keywords: 3-Methoxytyramine ; Haloperidol ; Dopamine release ; Dopamine agonists ; Gas chromatography ; Mass Spectrometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The value of 3-methoxytyramine (3-MT) as an indicator of impulse-related dopamine (DA) release has been assessed in rat corpus striatum. Moreover, the turnover of 3-MT was estimated by measuring its disappearance rate after COMT inhibition. Quantitation of 3-MT and DA was performed by gas chromatography/mass spectrometry (selected ion monitoring). Haloperidol in doses between 0.05 and 3 mg/kg p.o. did not increase endogenous 3-MT levels at any time up to 24 h after its administration, whereas it dose-dependently increased homovanillic acid and 3,4-dihydroxyphenylacetic acid. However, in doses above 0.1 mg/kg p.o., it enhanced the accumulation of 3-MT in clorgyline-pretreated animals. Conversely, baclofen in doses of 2 mg/kg i.p. and above decreased endogeneous 3-MT levels, but reduced the accumulation of this amine only poorly at 20 mg/kg i.p. in clorgyline-pretreated rats. A number of dopamine agonists, apomorphine (0.5 mg/kg i.v.), dipropyl-ADTN (0.03 mg/kg i.v.), but not bromocriptine (1 mg/kg i.v.) reduced endogenous 3-MT levels 10 min after administration by approximately 50%. The DA releasing agents d-amphetamine and methylphenidate showed different effects: the former increased endogenous 3-MT greatly, whereas the latter was without effect. The difference is likely to be related to the MAO inhibitory properties of amphetamine. 3-MT disappeared rapidly after COMT inhibition with 50 mg/kg i.v. tropolone (half-life of the initial disappearance about 1 min). The curve flattened off after 5–10 min. Turnover was calculated to be about 7 nmol/g/h, which corresponds to about a third of the turnover of DA. Our results suggest that an important part of DA metabolism occurs through 3-MT and that this amine is very effectively deaminated by MAO-A, so effectively indeed that increased formation does not increase its endogeneous levels. It appears, therefore, that 3-MT is not suitable as an indicator of increased DA release. However, it seems to have some value for an assessment of lowered DA release.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00499838
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  • 6
    Electronic Resource
    Electronic Resource
    Chemically modified teflon wall-coated open tubular columns for gas chromatography (1981)
    Springer
    Chromatographia 14 (1981), S. 19-22 
    Details
    ISSN: 1612-1112
    Keywords: Teflon columns ; Chemically modified teflon ; Gas chromatography ; Capillary columns
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Wall-coated open tubular columns prepared from chemically modified teflon tubing have been developed for gas chromatography. Chemical reaction of the inner walls of teflon tubing allows bonding of an adhesive layer on which a variety of stationary phaes can be coated. Test mixtures of alkanes and alcohols were used to investigate the chromatographic properties of these columns and the stability and mixing of the adhesive and stationary phae layers. the results in dicate that mixing of the layers is negligible and that the column is stable for a long period of time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02262057
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  • 7
    Electronic Resource
    Electronic Resource
    Die Herstellung von Glas-Kapillarsäulen für die Gas-Chromatographie (1981)
    Springer
    Chromatographia 14 (1981), S. 55-66 
    Details
    ISSN: 1612-1112
    Keywords: Capillary columns, glass ; Gas chromatography ; Column preparation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Kapillar-Gas-Chromatographie ist heute das sich am stärksten entwickelnde Gebiet der Gas-Chromatographie. Es gibt viele komplexe, neue Fragestellungen in der Analytik, welche den Einsatz spezieller Kapillarsäulen erfordem. Glücklicherweise gibt es aber auch eine große Zahl von Herstellungsverfahren für Kapillarsäulen, welche — noch mehr als bei der Herstellung von gepackten Säulen — eine Anpassung an die gestellten Aufgaben ermöglichen. In diesem Artikel werden die Herstellungsverfahren für Kapillarsäulen zusammengestellt und Anregungen gegeben, wie aufgaben-orientierte Säulen erreicht werden.
    Notes: Summary Glass capillary column chromatography is the most rapidly growing part of gas chromatography. There are many complex new analytical tasks and they require special capillary columns, Fortunately there is a wide range of column preparation methods available, and they make the preparation of glass capillary columns a more varied job than that of packed columns. In this paper these methods are reviewed and suggestions are given for making task-oriented columns.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02262064
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  • 8
    Electronic Resource
    Electronic Resource
    Gas chromatographic analysis of phenylurea herbicides following catalytic hydrolysis on silica gel (1981)
    Springer
    Chromatographia 14 (1981), S. 579-586 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Urea herbicides ; Catalytic hydrolysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A method is described for the rapid catalytic hydrolysis of phenylurea herbicides on silica gel at elevated temperatures. After derivatisation of the anilines produced with heptafluorobutyric acid anhydride final analysis is done on a gas chromatograph equipped with an electroncapture detector. Detection limits are in the 1–5 picogram range. The method has successfully been applied to residue analysis of water samples at the 1 ppb level. The determination of free anilines present in water samples and the potential of various techniques to be used to discriminate between free anilines and parent herbicides are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02262887
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  • 9
    Electronic Resource
    Electronic Resource
    Gas chromatographic analysis of water phenolic pollutants using acid-washed graphitised carbon black (1981)
    Springer
    Chromatographia 14 (1981), S. 86-88 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Graphitised carbon black ; Phenols ; Water pllutants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The fractionation of eleven phenols which may be contaminants in drinking water has been accomplished by using acid-washed graphitised carbon black modified with trimesic acid and PEG 20 M.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02279517
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  • 10
    Electronic Resource
    Electronic Resource
    Novel applications for headspace gas chromatography (1981)
    Springer
    Chromatographia 14 (1981), S. 447-451 
    Details
    ISSN: 1612-1112
    Keywords: Headspace analysis ; Gas chromatography ; Residual analysis of polyethylene terephthalate ; Acetylene reduction assay ; Ethylene evolution in germinating seed ; Acetaldehyde generation in polyester resin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary New application areas for headspace gas chromatography in agricultural and polymer degradation research are described. Specific examples are drawn from the various forms of headspace analysis with emphasis on the automated static equilibrium method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02263531
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  • 11
    Electronic Resource
    Electronic Resource
    The obstruction factor γ in gas chromatography (1981)
    Springer
    Chromatographia 14 (1981), S. 576-578 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Tortuosity factor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The relationship between the obstructive factor γ and velocity was restudied. The dependence of the obstructive factor on velocity was verified. The effects of diffusion coefficient and particle-to-column diameter ratio on the obstructive factor-velocity relationship were investigated. The results are consistent with Hawkes' hypothesis that values of γ at low velocities are averages over tightly packed and loosely packed domains while at high velocities they are weighted in favour of the loosely packed domains where there is more flow.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02262886
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  • 12
    Electronic Resource
    Electronic Resource
    Blending bulk dissolution and gas-liquid-adsorption with the mixing of two liquid stationary phases to increase selectivity (1981)
    Springer
    Chromatographia 14 (1981), S. 648-652 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Gas-liquid adsorption ; Bulk solution ; Mixed stationary phases
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary It is shown that the blending of some retention effects can make the resolution of complex mixtures on short classical columns as effective as on capillary columns.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02291105
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  • 13
    Electronic Resource
    Electronic Resource
    Headspace gas chromatographic determination of aromatic hydrocarbons in natural and waste water (1981)
    Springer
    Chromatographia 14 (1981), S. 699-703 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Headspace analysis ; Aromatic hydrocarbons ; Water analyses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The possibilities of using headspace analysis of aromatic hydrocarbon traces in aqueous solutions with changing values of the partition coefficients are discussed. A variant of headspace analysis of the simplest aromatic hydrocarbon in natural and waste water is described. It involves two-step gaseous extraction of a sample in vessels of varying volume before and after the equilibrium phase is replaced with a pure gas (air or nitrogen). This method permits to analyse 5–50 ml water samples with benzene and toluene contents varying from the ppb to the ppm range within an error not exceeding 155. The analysis time is about 1.5 h. The presence of non-volatile organic or mineral substances does not influence the determination. This method is unsuitable to heterogeneous systems (aqueous oil emulsions): before carrying out the analysis for the hydrocarbon content these systems have to be homogenized first.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02259458
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  • 14
    Electronic Resource
    Electronic Resource
    Factors affecting reproducibility in the manufacture of glass and siliceous glass open tubular (capillary) columns (1981)
    Springer
    Chromatographia 14 (1981), S. 484-487 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Open tubular (capillary) columns ; Glass columns ; Fused-silica columns ; Column testing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Column characteristics affecting the chromatographic behavior of glass and siliceous glass (“fused silica”) capillary columns include the dimensional uniformity of the column, the physical and chemical characteristics of the column wall and the characteristics of the liquid phase. In the case of the coated column the uniformity and thickness of the liquid phase film are the most important criteria affecting column reproducibility. The paper discusses these factors and their influence on column performance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02263539
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  • 15
    Electronic Resource
    Electronic Resource
    Analysis of complex industrial samples by gas chromatography; a report on selected past activities (1981)
    Springer
    Chromatographia 14 (1981), S. 203-211 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Quantitative analysis ; Copper oxide converter ; Inorganic gas analysis ; Determination of fluorine and oxygen ; Hydrocarbon analysis ; Wine analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A review of past activities concerning selected industrial analytical problems is given. This includes the following question: preparation of pure gas mixtures to be used for calibration, catalytic conversion of ester and pyridin samples to carbon dioxide and a one-point calibration method using peak heights, both for quantitative analysis, analysis of gas mixtures containing fluorine and inorganic fluorine compounds and the determination of the oxygen and fluorine content of the sample, separation and identification of hydrocarbons in shale oil and petroleum fraction samples, and analysis of wine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02260153
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  • 16
    Electronic Resource
    Electronic Resource
    Capillary gas chromatography of esters correlations between structure and retention index (1981)
    Springer
    Chromatographia 14 (1981), S. 143-147 
    Details
    ISSN: 1612-1112
    Keywords: Capillary columns ; Gas chromatography ; Retention index ; Structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The retention index of twenty different homologous series of esters have been determined experimentally on polar (Carbowax 1540) and non-polar (squalane) columns. General equations to calculate retention index have been established by statistical methods. The influence of the length and inductive effect of acid and alcohol chains and the relative position of the carboxylic group are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02314758
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  • 17
    Electronic Resource
    Electronic Resource
    Kaolin as support for porous layer open tubular columns (1981)
    Springer
    Chromatographia 14 (1981), S. 285-288 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Porous layer open tubular columns ; Kaolin as support ; Column performance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary PLOT columns have been prepared with kaolin as the liquid phase support. These columns show good efficiency with different stationary phases and good thermal stability with polar phases. The performance of columns is shown by the separation of various mixtures such as fatty acids, phenols and anilines which are of analytical importance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02259267
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  • 18
    Electronic Resource
    Electronic Resource
    Separation of xylidine isomers on heteroaromatic compounds by gas-liquid chromatography (1981)
    Springer
    Chromatographia 14 (1981), S. 39-40 
    Details
    ISSN: 1612-1112
    Keywords: Xylidine isomers ; Heteroaromatic liquid phases ; Gas chromatography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Nicotinic acid and 1H-benzotriazole appreciably resolved all the xylidine (dimethylaniline) isomers, while benzimidazole, nicotinamide and phthalimide can also separate all the isomers except 2,4- and 2,3-xylidines. The analyses were carried out on supports which were not treated with an alkali.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02262060
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  • 19
    Electronic Resource
    Electronic Resource
    Mixed phases of Superox 20M and OV-1 in fused silica and glass capillary gas chromatography (1981)
    Springer
    Chromatographia 14 (1981), S. 345-350 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Silica capillaries ; Glass capillaries ; Mixed gum phases ; Polarity and selectivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Mixed phases of Superox 20M and OV-1 can be coated homogeneously on the untreated wall of fused silica capillary columns. Excellent columns with regard to efficiency, inertness and thermal stability can be obtained. (CE〉95% and MAOT≥250°). The polarity and selectivity were ascertained with Rohrschneider-Reynolds probes and a capillary polarity test mixture. The analysis of an essential oil mixture illustrates the possibilities of mixed phases in practical capillary GC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02259233
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  • 20
    Electronic Resource
    Electronic Resource
    Characterization of glass, quartz, and fused silica capillary column surfaces from contact-angle measurements (1981)
    Springer
    Chromatographia 14 (1981), S. 387-397 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Capillary columns ; Fused silica ; Contact angle ; Wettability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary This paper describes the systematic characterization of glass and the newly introduced fused silica and quartz capillary columns from surface wettability measurements. Common gas chromatographic stationary phases were used in capillary-rise measurements at temperatures up to 300°C. By construction of Zisman plots and using the Cassie equation, the relative surface concentrations of wettable and non-wettable groups were determined. By application of the Fowkes equation, the dispersion force component of the surface energy was investigated. The influence of various surface treatments such as leaching, silylation, and polymeric film formation are discussed. Wettability measurements were also used to evaluate the thermostability of various treated surfaces and to compare the surface properties of glass, quartz, and fused silica. The wettability of the surfaces with selected stationary phases as a function of temperature is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02262872
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  • 21
    Electronic Resource
    Electronic Resource
    Determination of average molecular polarizabilities of polycyclic aromatic hydrocarbons directly from retention indices (1981)
    Springer
    Chromatographia 14 (1981), S. 707-708 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Polycyclic aromatic hydrocarbons ; Retention index ; Average molecular polarizabilities
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A significant correlation has been found between the retention indices of polycyclic aromatic hydrocarbons on non-polar stationary phases and the average molecular polarizabilities of the molecules separated on these phases. Equations have been derived for the determination of the average molecular polarizabilities, directly from the retention indices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02259460
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  • 22
    Electronic Resource
    Electronic Resource
    Factors affecting the retention of polycyclic aromatic hydrocarbons in gas chromatography (1981)
    Springer
    Chromatographia 14 (1981), S. 69-72 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Polynuclear aromatic hydrocarbons ; Retention index ; Vapour pressure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The retention index of a planar polynuclear aromatic hydrocarbon on the GC phases OV-101, SE-52, and OV-17 is strictly related only to the boiling point, and less closely to the relative molecular mass. The very approximates relation with connectivity index ins only a consequence of the latter. On a nematic lqiuid crystal phase, a variation of activity coefficient, expressed in terms of a shape factor, also influences the retention of PAH.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02279514
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  • 23
    Electronic Resource
    Electronic Resource
    Analysis of trace components in gases by gas chromatography (1981)
    Springer
    Chromatographia 14 (1981), S. 269-276 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Detector performance ; Trace analysis ; Catalytic conversion ; Multidimensional gas chromatography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Relationships are derived describing how the detection limit of a chromatographic system depends on the minimum detectable limit of the detector and the chromatographic parameters such as column length, efficiency, carrier gas flow rate and the capacity factor. Performance data of detectors developed in the last 25 years at the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences are given and a few selected application examples are listed. These include trace analysis by preconcentration and by direct analysis and the utilization of multidimensional gas chromatography with two columns, two detectors, a 12-port valve, and a catalytic conversion reactor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02259264
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  • 24
    Electronic Resource
    Electronic Resource
    A column packing for isothermal gas chromatographic analysis of C1−C5 paraffins and monoolefins and dimethyl ether (1981)
    Springer
    Chromatographia 14 (1981), S. 277-278 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; C1−C5 Hydrocarbons ; Dimethyl ether
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary An analytical GC method was developed which uses a single packed column consisting of three packings in series prepared with the following liquid phases: dimethyl sulfolane, propylene carbonate, and silver nitrate. This system provides satisfactory resolution of mixtures of C1−C5 hydrocarbons and dimethyl ether obtained when converting methanol to gasoline. Due to the high capacity of the column it is possible to inject larger sample amounts permitting trace analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02259265
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  • 25
    Electronic Resource
    Electronic Resource
    Analysis of phthalides from umbelliferae by combined liquid-solid and gas-liquid chromatography (1981)
    Springer
    Chromatographia 14 (1981), S. 452-454 
    Details
    ISSN: 1612-1112
    Keywords: Phthalides ; Umbelliferae ; Liquid-solid chromatography ; Gas chromatography ; Ligustilide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A liquid-solid chromatographic pre-fractionation of naturally occurring phthalides has been developed. The LSC was carried out on a column of silica applying a 1–50% gradient elution of diethyl ether (containing 2% methanol) in pentane. The enrichment in the fractions led to better possibilities for a gas chromatographic separation and isolation allowing further studies by spectroscopic methods. Ligustilide may easily isomerize during GC as a result of ageing of the column.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02263532
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  • 26
    Electronic Resource
    Electronic Resource
    Gas chromatographic separation of ethanolamines and ethylene glycols without preliminary derivatization (1981)
    Springer
    Chromatographia 14 (1981), S. 601-602 
    Details
    ISSN: 1612-1112
    Keywords: Ethanolamines ; Ethylene glycols ; Direct separation ; Gas chromatography ; Short glass capillaries
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary An effective and rapid GC separation of ethanolamines, even in the presence of ethylene glycols, using short glass capillary columns is developed. No preliminary derivatisation of the sample is necessary. The separation is completed in 6 minutes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02262893
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  • 27
    Electronic Resource
    Electronic Resource
    The determination of phenol in urine by enzymatic hydrolysis/headspace gas chromatography (1981)
    Springer
    Chromatographia 14 (1981), S. 507-509 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Headspace ; Phenol ; Urine ; Enzymatic hydrolysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A new method has been developed for the determination of phenol in urine in which the phenol conjugates are hydrolysed enzymatically and the liberated phenol is analysed by headspace chromatography. The results compare favourably with those obtained by the method of van Haaften and Sie in which acid hydrolysis is carried out in a heated GC precolumn. The enzymatic hydrolysis headspace technique appears to be very reliable and does not suffer from the disadvantages of precolumn acid hydrolysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02265629
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  • 28
    Electronic Resource
    Electronic Resource
    Comments on column characterization: A sulfur column (1981)
    Springer
    Chromatographia 14 (1981), S. 421-424 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Liquid sulfur ; McReynolds' constants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The McReynolds' constants for liquid sulfur as a stationary phase in gas-liquid chromatography (GLC) are presented. A simple graphical method of pattern analysis is used to indicate the uniqueness of the sulfur column as compared with other stationary liquid phases characterized by McReynolds. The limitations of using a single factor (as polarity) for the basis for the selection of GLC columns is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02262878
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  • 29
    Electronic Resource
    Electronic Resource
    Trennung, Identifizierung und Bestimmung von Treibgasen und Lösungsmitteln in Aerosol-Produkten mittels Gas-Chromatographie (1981)
    Springer
    Chromatographia 14 (1981), S. 351-354 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Kováts retention indices ; Propellants ; Solvents ; Aerosol packs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary A gas chromatographic method is described by which a nearly complete separation of all commonly used propellants and solvents and their identification and determination can be achieved in one step. The separation is by simple adsorption chromatography on columns packed with Porapak-T with a temperature program 100–180°C at 10°C/min. Kováts' retention indices have been calculated for isothermal conditions at 150°C respectively 100°C for the propellants, at 180°C for the solvents. An exact identification of the propellants and solvents by means of the Kováts' indices is practicable even in complex mixtures.
    Notes: Zusammenfassung Es wird eine gas-chromatographische Methode angegeben, welche eine fast vollständige Auftrennung aller handelsüblichen Aerosol-Treibgase und Lösungsmittel und ihre Identifizierung und Bestimmung in einem Schritt gestatet. Die Trennung erfolgt durch reine Adsorptions-Chromatographie and Porapak T-Säulen bei 100–180°C mit einer Temperaturate von 10°C/min. Zur Bestimmung der Retentionsindices nach Kovats wurden die Treibgase isotherm bei 150°C bzw. 100°C, die Lösungsmittel bei 180°C aufgetrennt. Anhand der Kovats-Indices ist eine eindeutige Identifizierung der Treibgase und Lösungsmittel selbst in vielfältigen Gemischen möglich.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02259234
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  • 30
    Electronic Resource
    Electronic Resource
    Glass capillary SCOT columns by a single-step coating method (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 11-16 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; SCOT column ; Coating, liquid phase ; Single-step coating ; Phenols ; Phenolic acids ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A single-step coating method for the preparation of glass capillary SCOT columns is described. It is reproducible and less time-consuming than the well-known two-step coating procedures. Other methods attempted are discussed briefly. Both the flame ionization and electron capture detectors could be used in conjunction with temperature programming. The separations achieved with an “activity mixture”, phenols and phenolic acids, illustrate the resolution obtained. The columns are suitable for quantitative determinations and a comparison is made with a conventional packed column.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040104
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  • 31
    Electronic Resource
    Electronic Resource
    High-speed aqueous gel permeation chromatography of pollen allergens (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 35-36 
    Details
    ISSN: 0935-6304
    Keywords: Gel permeation chromatography, GPC ; High-speed analysis ; Pollen allergen extract ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040109
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  • 32
    Electronic Resource
    Electronic Resource
    Continuous and gradient TLC development of 4-dimethylaminoazobenzene-4′-sulfonyl amino acid derivatives (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 115-120 
    Details
    ISSN: 0935-6304
    Keywords: TLC ; Gradient and continuous development ; Amino acids ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Thin-layer gradient elution chromatography is a convenient technique for separation of very complicated mixtures; in some cases the gradient technique can be replaced by continuous development. The two techniques are compared in practice by using them to separate a mixture of dabsyl derivatives of amino acids.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040305
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  • 33
    Electronic Resource
    Electronic Resource
    Rapid separation of isomeric Xylenes on a short liquid crystal-coated glass capillary in the supercooled temperature range (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 123-124 
    Details
    ISSN: 0935-6304
    Keywords: (GC)2 in short capillaries ; Liquid crystalline stationary phase ; Supercooled temperature range ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040307
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  • 34
    Electronic Resource
    Electronic Resource
    Improved separation of glycosylated tryptic peptides by RP-HPLC (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 302-304 
    Details
    ISSN: 0935-6304
    Keywords: Liquid chromatography ; Hemagglutinin glycoprotein of influenza virus investigated ; Peptide separation ; 14C labeling for identification ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The potential of reverse-phase high-performance liquid chromatography (RP-HPLC) for the separation of the tryptic glycopeptides of the hemagglutinin (HA) glycoprotein of influenza virus has been investigated. Excellent separation was accomplished with sample recovery of at least 90-95% by the utilization of an octadecasilyl silica stationary phase and a phosphoric acid/n-propanol solvent system. Eight glycosylated tryptic peptide classes were resolved from the HA glycoprotein of the A/USSR/90/77 virus strain.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040615
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  • 35
    Electronic Resource
    Electronic Resource
    Plate requirements in chromatography and distillation (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 477-478 
    Details
    ISSN: 0935-6304
    Keywords: Square relationship ; Effect of separation efficiency ; Simple equation for plate comparison ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040913
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  • 36
    Electronic Resource
    Electronic Resource
    Product news (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 42-42 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040114
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  • 37
    Electronic Resource
    Electronic Resource
    Quantitative evaluation of thin-layer chromatograms. 5. Calculation of reflectance and transmission using Markov chains (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 141-142 
    Details
    ISSN: 0935-6304
    Keywords: TLC ; Reflectance ; Transmission ; Probability vector ; Transition matrix ; Markov chains ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Changes of reflected and transmitted light in cases where a band lies in different sublayers of a thin-layer chromatogram are calculated by the use of Markov chains. The problem of a “random walk with absorbing barriers” is described and compared with the problem of transmission and reflectance of light in a layer of sorbent.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040315
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  • 38
    Electronic Resource
    Electronic Resource
    Trace analysis of fungicides in grape juice and wine using glass capillary gas chromatography (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 151-155 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; XAD-2 resin ; Fungicide residues, determination in wine and grape juice ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The fungicides Bupirimate, Fenarimol, and Vinclozolin were sprayed on Vines. The fruits were harvested 8 and 21 days after the final application and processed to juice and wine. The fungicide residues were determined by filtration of the samples throug XAD-2 after pH adjustment, elution with methylene chloride, and glass capillary gas chromatography with SE-30 as stationary phase. Residue values of the three compounds were reported before and after fermentation. The precision of the analytical method was established by spiking portuguese white wine and spanish grape juice with the three fungicides and Triadimefon. The recoveries were in the range 80%-100%, except for Vinclozolin.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040402
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  • 39
    Electronic Resource
    Electronic Resource
    A simple and safe sealing technique for static coating (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 183-183 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; End-sealing technique for static coating ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040410
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  • 40
    Electronic Resource
    Electronic Resource
    Product news (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 197-200 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040415
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  • 41
    Electronic Resource
    Electronic Resource
    Qualitative evaluation of aromatic herbs by direct head space (GC)2 analysis. Methodology and some preliminary applications (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 215-217 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary columns ; Direct method for flavor evaluation ; Aromatic herbs analysis ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A simple, quick method is described for GC head space evaluation of herbs and drugs. The proposed procedure consists of milling a weighed sample of a certain herb in a glass device like a Braun MXK coffee grinder, modified in such a way that a special gas-tight valve allows the direct sampling of the vapors. Glass capillary columns are used to analyze the head space volatiles. Some preliminary applications of the method are given.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040504
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  • 42
    Electronic Resource
    Electronic Resource
    A quick and clean technique for sealing capillary columns using the static coating method (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 232-232 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; Static coating ; Sealing method ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040508
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  • 43
    Electronic Resource
    Electronic Resource
    Glibenclamide in serum: HPLC determination with pre-column derivatization (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 237-239 
    Details
    ISSN: 0935-6304
    Keywords: HPLC fluorescence detection ; Pre-column derivatization ; Glibenclamide ; Serum drug levels ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040511
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  • 44
    Electronic Resource
    Electronic Resource
    Chromatography calendar (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 253-254 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040516
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  • 45
    Electronic Resource
    Electronic Resource
    Fourth International Symposium on Capillary Chromatography (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 42-42 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040113
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  • 46
    Electronic Resource
    Electronic Resource
    HPLC with chemically bonded stationary phases. 4. Amide, carbamate and chiral α-aminoamide phases (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 81-83 
    Details
    ISSN: 0935-6304
    Keywords: HPLC bonded phases ; Derivatisation of aminopropyl silica ; Resolution of enantiomers ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040208
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  • 47
    Electronic Resource
    Electronic Resource
    Recent developments in chromatography and electrophoreses, 10. Edition by Alberto Frigerio and Malcolm McCamish, Elsevier, Amsterdam (1980), pp. 340, $ 68.25 (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 308-308 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040618
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  • 48
    Electronic Resource
    Electronic Resource
    The activity of silaceous capillary columns for gas-liquid chromatography (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 38-39 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Fused silica capillary column ; Activity ; Hydroxylated surfaces ; Dehydroxylated surfaces ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040111
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  • 49
    Electronic Resource
    Electronic Resource
    Masthead (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981) 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040201
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  • 50
    Electronic Resource
    Electronic Resource
    On-column detection using a fused silica column (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 83-85 
    Details
    ISSN: 0935-6304
    Keywords: HPLC ; Nanoliter volume detector ; 1.5 × 10-5 AU noise (0.1 μl 0.1% benzene in methanol) ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040209
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  • 51
    Electronic Resource
    Electronic Resource
    Product news (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 95-96 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040213
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  • 52
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    Electronic Resource
    Ion-pair HPLC of chlorhexidine-A simple, rapid method for quantitation in pharmaceutical preparations (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 132-134 
    Details
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Ion-pair reversed-phase HPLC ; Chlorhexidine in pharmaceutical preparations ; Quantitation within 0.66-3.41% relative standard deviation ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040311
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  • 53
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    Electronic Resource
    Letter to the Reader (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 142-142 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040316
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  • 54
    Electronic Resource
    Electronic Resource
    Masthead (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981) 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040401
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  • 55
    Electronic Resource
    Electronic Resource
    Influence of structure and polarity of polysiloxanes on retention of N-TFA butyl esters of amino acids (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 247-248 
    Details
    ISSN: 0935-6304
    Keywords: Gas Chromatography ; No simple relationship found between polarity of polysiloxane phases and N-TFA amino acid butyl esters ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In this work, we have investigated the influence of the polarities and structures of 13 polysiloxanes on the retention of some N-TFA N-butyl esters of amino acids. Gehrke [1] was the first to examine the possible relationship between polarity and retention data of amino acid derivatives for 9 stationary liquid phases. He concluded that the molecular structure of the stationary liquid phase is an important factor determining retention.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040515
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  • 56
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    Electronic Resource
    Application of ion-exchange resin coated plates for thin-layer chromatography of sulfonamides and some other chemotherapeutic compounds (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 287-291 
    Details
    ISSN: 0935-6304
    Keywords: Thin layer chromatography, TLC ; Ion exchange resin plates/tert-butyl alcohol, H2O, Na2HPO4, Nacl; ethanol, H2O, Na-acetate, NaCl ; Sulfonamides and other chemotherapeutic substances ; Qualitative analysis ; Effect of pH variation on Rf values ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A thin-layer chromatographic method is described for sulfonamides and some other chemotherapeutic compounds. Ion-exchange resin precoated plates (Fixion 50 × 8 Na+, Chinoin, Budapest or Polygram Ionex-25 SA-Na, Macherey-Nagel and Co.,Düren, FRG) are employed with Na2HPO4 or Na-acetate (adjusted to different pH values) containing NaCl and tert-butyl alcohol or ethanol as developing solvent system. For qualitative and/or semiquantitave determinations the chromatograms can be stained: (A) with o-tolidine, after chlorination; (B) with p-dimethylaminobenzaldehyde; (C) with p-dimethylaminocinnamaldehyde.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040608
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  • 57
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    Separation of pesticides by capillary gas chromatography. Part 2: Organophosphorus insecticides (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 346-347 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; WCOT-glass capillary ; Organophosphorus insecticides ; Pesticides ; Metabolites ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This article considers the separation of 23 organophosphorus insecticides to which two metabolites have been added. The high resolution of the column permits detection of the Z and E isomers of three of these insecticides.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040708
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    Product news (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 361-362 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040715
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  • 59
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    Fused silica capillary column GC/MS for the analysis of priority pollutants (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 366-384 
    Details
    ISSN: 0935-6304
    Keywords: GC/MS ; Capillary columns, fused silica ; Priority pollutants ; Quantitation ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Operational characteristics have been determined for fused silica capillary column (FSCC) GC/MS as applied to “extractable” priority polutants. Chromatographic data show excellent relative retention time (RRT) intralaboratory precision and interlaboratory accuracy when multiple internal standards are empolyed. Potential chromatographic problems, such as column overload and “double peaking”, are addressed. Response factor relative standard deviations (RSD) at 50 ng for most of the extractable priority pollutants over the long term indicated precise determination (i.e. RSD generally ≤ 10%). Linearity was demonstrated over two orders of magnitude for FSCC GC/MS analysis of compounds with relatively low and high RF (response factor) values. Potential quantitative problems, such as saturation, are discussed. For certain aromatic priority pollutants interlaboratory RF agreement was observed. This was noted as perhaps the most important property of FSCC GC/MS analysis when the multiple internal standard approach is utilized. Determinations of extractable priority pollutants are directly compared for paced column GC/MS and FSCC GC/MS analysis of separate and composited extracts. For six extracts analyzed in triplicate, the latter configuration was shown to produce more consistent results. In view of the superior analysis logistics of composite extract FSCC GC/MS analysis, this approach was established as the preferred method for the analysis of priority pollutants classified as extractable.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040803
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  • 60
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    Simultaneous detection of total and halogenated hydrocarbons in complex environmental samples (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 393-397 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, fused silica ; Simultaneous detection ; Splitting capillary effluent ; Detection limit of 1 ppm Archlor 1254 ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A state-of-the-art gas chromatographic system for automatic simultaneous detection of halogenated and normal hydrocarbons has been developed, which consists of a standard Hewlett-Packard 5880 with a fused silica capillary column, whose effluent is split between the standard flame ionization detector and a Tracor Hall electroconductivity detector. The system provedes excellent capillary chromatography results and high sensitivity for halogenated compounds (a detection limit of 1 ppm Archlor 1254 in fuel oil). Reliability has been provides in the daily analysis of complex environmental samples.Emergency response cleanup and the containment of hazardous chemical spills and chemical dump sites forces one to deal with samples that are very complex. The contain large numbers of naturally occurring organic compounds and varying types of organic pollutants. Capillary chromatographic techniques of gas chromatographic and gas chromatographic/mass spectrometric analyses are necessary to achieve the resolution required for the analysis of these samples.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040805
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  • 61
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    Thin-layer chromatography with high-boiling mobile phases.1. Investigation of the flow of the high-boiling mobile phasesPresented in part at the “CAMAG” conference held in the USSR on December 2-4,1980 (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 398-401 
    Details
    ISSN: 0935-6304
    Keywords: Thin layer chromatography ; Use of molten solids as mobile phase advantageous ; Migration at higher temperature (80-180°C) studied ; Correction of front position for unsaturated flow possible ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This paper considers some aspects of a new TLC technique using a molten mobile phase which is solid under ambient conditions. The flow of high-boiling mobile phase at elevated temperature in thin-layer chromatography has been investigated and it is shown that the equation Zf2 = kt is not applicable to migration of the high boiling mobile phase front. The flow stability of the high-boiling mobile phase is noted. It is suggested on the basis of studies of concentration profiles of the solidified mobile phases by scanning photometers that the shape of the mobile phase concentration profile be taken into account in calculation of Rf Values.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040806
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  • 62
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    Masthead (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981) 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240041001
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  • 63
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    Analysis of urine by liquid chromatography in the ion-exchange or hydrophobic modeThis paper was presented in part at the 1980 Pittsburgh Conference, Atlantic City, N. J., March 1980. (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 500-507 
    Details
    ISSN: 0935-6304
    Keywords: Liquid chromatography ; Weak anion exchanger ; Octadecyl bonded packing ; Urine analysis ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The analysis of ultraviolet-absorbing constituents in urine was undertaken by anion-exchange and reversed-phase liquid chromatography. A newly developed anion exchanger (TSK-IEX540 DEAE) was used for ion-exchange mode liquid chromatography and its high polarity and physical strength greatly reduced the analysis time. Up to 80 peaks were resolved within 30 min. Hydrophobicity values were used to predict the retention times of acids in reversed-phase mode liquid chromatography.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240041005
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  • 64
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    Role of injection time and septum holder in split injection of polycyclic aromatic hydrocarbons (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 523-524 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; Split injection ; Injection time influence ; PAH ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240041009
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  • 65
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    An easy and reliable method for end-sealing glass capillary columns (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 533-534 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; End-sealing method for static coating ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240041014
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  • 66
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    Combination of micro high performance liquid chromatography and fourier transform infrared spectrometry using the potassium bromide crystal buffer memory technique (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 532-533 
    Details
    ISSN: 0935-6304
    Keywords: Micro high performance liquid chromatography, MHPLC ; Fourier transform infrared spectrometry, FT- IR ; Combination of MHPLC and FT-IR ; KBr buffer memory technique ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240041013
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  • 67
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    Liberti and Sievers win Tswett Medal 1981 (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 546-546 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240041022
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  • 68
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    Reversed phase thin layer chromatography of phenols on chemically bonded C18 layers (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 557-560 
    Details
    ISSN: 0935-6304
    Keywords: Thin layer chromatography, TLC, HPTLC ; Reversed phase, chemically bonded ; Phenols ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240041104
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  • 69
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    Rapid boiling point assay of tar from coal gasification by gas chromatography (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 580-581 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Coal gasification tar ; Boiling point distribution ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240041108
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  • 70
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    An improved ion-pairing reagent for HPLC (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 584-585 
    Details
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Reverse-phase mode ; TBAOAc/NH4OAc ion-pairing reagent circumvents problems ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240041111
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  • 71
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    Chromatography calendar (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 591-594 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240041115
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  • 72
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    Masthead (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981) 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240041201
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  • 73
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    Simple GC/FID trace determination of toluene in silicone fluids (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 647-648 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Direct injection of silicone fluids method of choice for determining trace organic contaminants ; ≥ 1 ppm toluene determined ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240041209
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  • 74
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    Resolution of organic sulfite diastereoisomers using silica gel liquid chromatography (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 653-654 
    Details
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Diastereoisomer separation of organic sulfites ; Bis(2-aryl-3-oxotetrahydro-2H-1,2-oxazin-5-yl) sulfite ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240041212
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  • 75
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    TLC determination of airbone carbofuran and quinalphos for industrial hygiene purposes (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 659-660 
    Details
    ISSN: 0935-6304
    Keywords: Thin layer chromatography, TLC ; Quantitation by TLC scanner ; Detection mode, reflection ; Measuring mode, absorbance ; RSD 3% for carbofuran and 1% for quinalphos ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240041216
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  • 76
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    A selection method for high performance stationary phases in glass capillary GC. Part 1: The molecular weight distribution of polyglycol phases (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 3-5 
    Details
    ISSN: 0935-6304
    Keywords: Molecular weight distribution ; Polyglycol GC stationary phases ; Carbowax ; Ucon ; Pluronic ; Emulphor ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The width of the molecular weight distribution (MWD) of polymer stationary phases influences their polarity and other gas chromatographic characteristics. The MWD of the most frequently used polyglycol-type stationary phases such as Carbowax, Ucon, Emulphor and Pluronic has been determined and compared. The MWD determined by gel chromatography allows for the characterization of the actual batch of a stationary phase, provides a check on its consistency and helps to screen out the apparently less promising phases.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040102
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  • 77
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    Quantitative analysis of some preservatives in pharmaceutical formulations by different chromatographic methods (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 24-26 
    Details
    ISSN: 0935-6304
    Keywords: HPTLC ; HPLC ; GC/MS ; Methyl hydroxybenzoate (MHB) ; Propyl hydroxybenzoate (PHB) ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Different chromatographic methods for determination of methyl hydroxybenzoate and propyl hydroxybenzoate in pharmaceutical formulations are compared. Procedures for HPTLC, HPLC and GC/MS are given.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040106
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  • 78
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    Analysis of cardenolides of Convallaria majalis by high pressure liquid chromatography (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 37-38 
    Details
    ISSN: 0935-6304
    Keywords: HPLC ; Cardenolides in Convallaria majalis ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Cardenolides of Convallaria majalis were separated by reverse-phase HPLC on Partisil PXS 10/25 ODS columns using 25% acetonitrile as mobile phase. Periplorhamnoside, convallatoxin and either convallatoxol or convalloside were resolved from glycoside mixtures. Convallatoxin and periplorhamnoside were identified in plant extracts, convalloside and convallatoxol were not resolved from non-cardenolide material present in leaf extracts.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040110
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  • 79
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    Some comments on the barium carbonate (Grob) procedure for treating glass capillary columns for gas-liquid chromatography (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 79-80 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Glass capillary columns ; Barium carbonate ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040207
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  • 80
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    Application of multidimensional switching to the analysis of volatiles (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 86-89 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Packed columns ; Multidimensional switching, MDSS ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A multidimensional switching system with two packed columns has been used for the analysis of volatiles. Use of a high-boiling solvent and the backflush mode permitted total resolution of the mixture discussed in a short analysis time.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040210
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  • 81
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    Masthead (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981) 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040301
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  • 82
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    A study of the effects of temperature and pressure on the retention time in series-coupled columns under conditions of constant mass flow rate (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 102-108 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Series-coupled columns with different stationary phases ; Independent temperature control of columns ; Constant mass flow rate ; Retention time expressions ; Theory ; Selectivity control ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The technique of controlling chromatographic selectivity by the adjustment of column temperatures in systems of series-coupled columns is investigated by means of a general model incorporating the effects of temperature and mobile phase compressibility. In a previous article the performance of series-coupled columns was investigated under conditions of constant overall pressure drop. The present paper, on the other hand, considers systems in which a constant mass flow rate is maintained at all temperatures. The expressions derived for the effective partition coefficient and the retention time are compared with those of the previous paper. The numerical results for two-column systems exhibit the same major trends as those for constant pressure drop. It is shown that the effective partition coefficient is slightly dependent on the mass flow rate.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040303
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    Effect of adsorption on resolution in capillary gas chromatography (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 127-129 
    Details
    ISSN: 0935-6304
    Keywords: Gas liquid chromatography ; Open tubular capillary columns ; Adsorption and resolution ; Hydrocarbons ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040309
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    Rapid combined liquid chromatography/mass spectrometry method for quantitative analysis of atrazine (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 130-131 
    Details
    ISSN: 0935-6304
    Keywords: Liquid chromatography/mass spectrometry ; Atrazine ; Quantification ; Triazine herbicides ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040310
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    Product news (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 143-145 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040317
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    Chromatography calendar (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 147-148 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040318
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    Glass capillary gas chromatography with simultaneous flame ionization (FID) and Hall® element-specific (HECD) detection (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 164-168 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; Simultaneous detection with effluent splitter ; Element-specific detection ; Petroleum residues ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Two glass capillary gas chromatographic systems were equipped with inert effluent splitters which allowed simultaneous data acquisition using nonspecific and element-specific detectors. Simultaneous detection was achieved using the nonspecific flame ionization detector (FID) and the Hall® electrolytic conductivity detector (HECD) operated in either the sulfur-or the nitrogen-specific mode. Typical application of the simultaneous detection system as applied to analysis of petroleum residues is briefly described. The Hall electrolytic conductivity detector can be made element specific for halogen-, sulfur-, or nitrogen-containing compounds. Simultaneous detection enhances the information yield from a single sample injection and proves to be a powerful complementary technique when used with computerized gas chromatography/mass spectrometry.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040404
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  • 88
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    Glass capillary T-connections for high resolution GC (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 186-187 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; Effluent splitter, preparation of ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040412
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  • 89
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    Chromatography calendar (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 191-192 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040414
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  • 90
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    Gas-liquid chromatography of amino acids: Columns and methodology as a basis for routine amino acid analysis using glass capillary gas chromatography (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 218-223 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; Column preparation ; “Split” vs. “on-column” injection ; Amino acid analysis, quantitative 10 ng level ; Average relative standard deviation 1% ; Fish muscle protein analysis ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A carefully Standardized technique is described for the preparation of glass capillary columns which can be used successfully for routine quantitative amino acid analysis. Comparison is made between two different modes of sample injection. Preliminary quantitative results from “split” injection and “on-column” injection techniques are evaluated statistically and it is concluded that the “on-column” system is a prerequisite for quantitative amino acid analysis by glass capillary gas chromatography. An analysis of fish muscle protein hydrolyzate illustrates an application of this technique and results are compared with those from a packed column analysis.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040505
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  • 91
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    Theoretical determination of optimum composition of the binary mobile phase for distribution of substances in thin-layer chromatography (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 224-227 
    Details
    ISSN: 0935-6304
    Keywords: Thin-layer adsorption chromatography ; Optimum separation ; Binary mobile phases ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The measure of the distribution of a mixture of substances in TLC with a binary mobile phase is expressed as ΔRM1,2i,j which represents the difference between the RM values of substances i and j on use of the binary solvent 1 + 2 as the mobile phase. The possibility of determining its maximum value at an optimum composition of the binary mobile phase is demonstrated in this paper. This value can calculated from experimental and theoretical functions RM1,2 = f(Φ1) of substance i and j. More simply, ΔRM1,2i,j can be calculated theoretically from easily measurable adsorption parameters of excess adsorption isotherms and from chromatographic parameters obtained for pure solvents. The ΔRM1,2i,j value calculated theoretically can be utilized in a pilot technique for determination of the optimum composition of the mobile phase in gradient liquid chromatography.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040506
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  • 92
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    Electronic Resource
    Glass capillary column chromatography of mixed derivatives of primary prostaglandins, 6-keto prostaglandin F1α and thromboxane B2 (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 437-443 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; Gas chromatographic profiles ; n-Butylboronates ; Alkyl-oximes ; Primary prostaglandins ; 6-Keto prostaglandin F1α ; Thromboxane B2 ; Isomers of prostaglandin F1α ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This work describes the use of glass capillary columns (GCC) in the rapid concurrent analysis of primary prostaglandins (PGs) (e. g. PGE2, PGE2, PGF2α) and other functionally significant metabolites of arachidonic acid (AA) such as TXB2 and 6-keto PGF1α. The use of a new multistep mixed derivatization approach that generates the methyl esters of n-butylboronate, pentafluorobenzyloxime, trimethylsilyl ether derivatives of these compounds remarkably simplifies the GC profiling of the three main pathways of AA metabolism (PGs, thromboxane, and prostacyclin). Furthermore, isomeric species giving very similar or identical mass spectral patterns can be easily identified by their relative retention times on high efficiency capillary columns.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040903
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  • 93
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    Prediction of experimental parameters in combined isocratic and gradient elution reversed phase high performance liquid chromatography (RP-HPLC) using acetonitrile as organic modifier (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 276-279 
    Details
    ISSN: 0935-6304
    Keywords: Liquid chromatography ; Linear elution strength mobile phase technique ; Calculation of eluent compostion ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The use of gradient elution in RP-HPLC is increasing. Aqueous buffers, such as phosphate at pH 1.7, with acetonitrile as the organic modifier are particularly advantageous as eluents with linear elution strength (LES). In the isocratic mode, under the experimental conditions used, fairly good linearity exists between logk' and xB (xBº is the volume ratio of the organic modifier, i.e. acetonitrile) with a correlation coefficient of 0.9995. The relationship between isocratic and gradient elution parameters, such as xB, xBº (starting composition in gradient elution), m (slope of the linear gradient), is transparent and the parameters of interest can be predicted fairly accurately using simple equations. The proposed system could be used in elaboration of a general retention index system for organic molecules in RP-HPLC.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040606
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  • 94
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    Electronic Resource
    Abbenda (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 482-482 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040916
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  • 95
    Electronic Resource
    Electronic Resource
    Fused silica capillary GC/MS coupling: A new, innovative approach (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 495-499 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary column, fused silica ; Mass spectrometry ; Interface, direct coupling ; On-column injection ; Aflatoxin B1 ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A novel fused silica capillary GC/MS direct coupling is described which ensures quantitative transfer of sample from the point of injection to the ion source of a mass spectrometer without contacting any surfaces other than the column wall. This device permits GC analysis of highly labile substances. Aflatoxin B1, previously considered unassayable by GC, can now be determined by GC/MS.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240041004
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  • 96
    Electronic Resource
    Electronic Resource
    Product news (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 309-314 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040619
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  • 97
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    Electronic Resource
    Chromatography calendar (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 292-292 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040609
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  • 98
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    Electronic Resource
    To the Editor (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 292-292 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040610
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  • 99
    Electronic Resource
    Electronic Resource
    Rapid on-line analysis of low molecular weight hydrocarbons using glass capillary gas chromatography (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 333-336 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; Rapid analysis ; On-line analysis ; Low molecular weight hydrocarbons ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Rapid analysis is important for on-line chromatography. Gaseous or vaporized samples have been injected via heated gas sampling valves of less than 500 μl dead volume. The critical sampling and split problems could be solved by temperature programming. The general analysis described could be successfully used inter alia in scouting reactions.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040705
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  • 100
    Electronic Resource
    Electronic Resource
    Partition thin-layer chromatography of some triazine herbicides (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 357-358 
    Details
    ISSN: 0935-6304
    Keywords: Partition thin-layer chromatography ; Pesticides ; Separation of the s-triazine herbicides ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040713
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