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  • 1980-1984  (38,601)
  • 1965-1969  (25,871)
  • Chemistry  (57,526)
  • Life and Medical Sciences  (6,945)
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Year
  • 101
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 319-326 
    ISSN: 0935-6304
    Keywords: Capillary GC ; Band broadening in space ; Flooded column inlet ; Retention gap ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In on-column or in splitless injection with recondensation of the solvent, the length of the flooded zone in the column inlet depends primarily on the wettability of the internal wall of the inlet. For columns with a coated inlet this explains why peak distortion due to band broadening in space by a certain sample volume is pronounced in one case and hardly observable in another. Glass or fused silica capillaries silylated with diphenyltetramethyldisilazane were found to give optimal retention gaps. They combine thorough and thermostable deactivation with good wettability and low retention power. On the other hand it is very easy to deactivate fused silica capillaries with Carbowax. The resulting retention gaps are suitable for a wide range of applications and are particularly attractive for the analysis of dirty samples which require frequent replacement of the inlet.
    Additional Material: 2 Ill.
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  • 102
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 332-333 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary columns ; Polarity mixtures ; Reaction products ; 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
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  • 103
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 336-337 
    ISSN: 0935-6304
    Keywords: Ion chromatography ; Multidimensional column ; Borophosphosilicate glass (BPSG) film ; VLS ; 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
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  • 104
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 342-343 
    ISSN: 0935-6304
    Keywords: Gas-liquid chromatography ; Logarithmic retention index ; Equation for the calculation of column efficiency ; 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
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  • 105
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984) 
    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
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  • 106
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 433-435 
    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
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  • 107
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 370-374 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Trace analysis ; On-column injection ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Large sample volume on-column injection (up to 250 μL) of n-pentane solutions of halogenated hydrocarbons has been employed for the direct measurement of both low-boiling and high-boiling compounds in what is essentially a single run. Two-bonded phase, fused-silica capillary columns are joined in series, through which the low-boiling compounds are first chromatographed and detected with an electron capture detector. High-boiling compounds are then trapped in a section joining the two columns, and subsequently chromatographed in the second column, using the same detector. This procedure permits analysis at the ppt level.
    Additional Material: 7 Ill.
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  • 108
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 404-410 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Multidimensional capillary columns ; Enantiomeric separations ; Intermediate trapping ; Mixed polarities ; Terpene alcohols ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 109
    ISSN: 0935-6304
    Keywords: Low and high resolution liquid chromatography ; Gas chromatography ; Capillary columns ; Alkali flame detection ; Chemical ionization mass spectrometry ; Nitro-PAHs ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An analytical procedure is described for the fractionation of organic compounds present in environmental samples and the determination of nitro polyaromatic hydrocarbons (nitro-PAHs). Both low and high resolution liquid chromatography are employed for the prefractionation of the soluble organic fraction (SOF) extracted from particulate matter or gaseous pollutants collected on adsorption traps. High resolution gas chromatography is used to analyze four fractions containing alkanes, PAHs, nitro-PAHs, and other polar PAHs. Nitrogen-containing species are separated by GC and detected specifically using an alkali flame (NPD) detector. Flame ionization (FID) detection, GC-MS of positive ions, and negative ion chemical ionization MS of the whole fraction is used for the identification and quantitation of the various components. The composition of SOF extracted from particulate matter emitted from diesel exhausts is elucidated and a large number of nitro-PAHs identified by the combination of the various techniques.
    Additional Material: 7 Ill.
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  • 110
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984) 
    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
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  • 111
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 509-514 
    ISSN: 0935-6304
    Keywords: Gas chromatography, GC ; OV-1/FFAP mixed phase, high-temperature ; silylated glass capillary ; Polar phase-coated HTS capillary ; Golay curves of mixed phases ; Thermal and long-term stability of OV-1/FFAP ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: As an alternative to acid pretreated UCON and FFAP capillaries for the analysis of wide-boiling free fatty acid mixtures, OV-1 : FFAP phase mixtures were used on high-temperature silylated inert glass capillary columns. The HETP-carrier gas velocity curves, peak asymmetry factors, coating efficiency, gas phase and stationary phase contributions to the mass transfer resistance were determined for various OV-1 : FFAP ratios. Mixed-phase capillaries showed optimum performance at a 2 : 1 OV-1 : FFAP ratio. The thermal and long-term stability of OV-1-stabilized FFAP columns surpassed those of the UCON and pure FFAP reference column used.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 112
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 531-532 
    ISSN: 0935-6304
    Keywords: Gas chromatography, GC ; Capillary columns ; Retention gaps ; Large sample volumes ; Flooded zone ; 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
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  • 113
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 529-531 
    ISSN: 0935-6304
    Keywords: Capillary electrophoresis ; High resolution separation ; High speed analysis ; Dansyl amino acids ; Fluorescamine labeled peptides ; 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
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  • 114
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 536-537 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary column ; On-Column injection ; Vaporizing injection ; Decomposition ; α-Ferrocenyl carbinols ; 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
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  • 115
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 580-581 
    ISSN: 0935-6304
    Keywords: Ion chromatography, IC ; Steel surface analysis ; Carbonate, chloride, nitrite ; 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
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  • 116
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 620-624 
    ISSN: 0935-6304
    Keywords: Gas chromatography, GC ; Glass capillary columns ; Immobilization ; Gamma radiation ; Very thick films ; Nonpolar stationary phases ; OV-1, OV-101, SE-54 ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Borosilicate glass capillaries, silylated and coated with OV-1 or SE-54, were irradiated by a 60Co gamma source. The effect of radiation on chromatographic performance was determined for a series of dosages and was evaluated before and after rinsing with solvent. Results for both regular and thick films were obtained.
    Additional Material: 3 Ill.
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  • 117
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 632-635 
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Diode array spectroscopy ; Trace enrichment ; Algal pigments ; 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
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  • 118
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 641-643 
    ISSN: 0935-6304
    Keywords: Gas chromatography, GC ; Fused silica capillary columns ; Bonded stationary phase ; Distilled beverages ; Direct analysis ; 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
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  • 119
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 649-652 
    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
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  • 120
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 671-678 
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Isomer separation ; Mutagenic compounds ; Nitropolycyclic aromatic hydrocarbons ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Since positional isomers of several nitro-polycyclic aromatic hydrocarbons (nitro-PAH) contain widely different mutagenic properties, methods for separating the isomers were investigated. High performance liquid chromatography with dichloromethane in hexane on silica gave the best resolution for the majority of the compounds. A few groups of isomers were better resolved with other modifiers or with reversed phases. Of the reversed phase systems, methanol-water gave better resolution than acetonitrile-water. With dichloromethane/hexane on silica, the retention was found to depend on the presence of a bay nitro group (first), the number of H atoms peri to the nitro group (second), and the length/breadth ratio of the molecule (third).Front electron density calculations were combined with the structure-retention relations in making tentative structure assignments of minor isomers of nitro-PAH.
    Additional Material: 12 Ill.
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  • 121
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 700-701 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Glass capillary columns ; Immobilization ; 60Co gamma radiation ; Medium-polarity phase ; OV-1701-Vi ; 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
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  • 122
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 615-619 
    ISSN: 0935-6304
    Keywords: Theory ; Sorption ; Plate model ; Band widths ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The original plate model of chromatography is extended to the sorption process occurring at the column inlet and the desorption process at the column exit. At the column inlet it is shown that sufficiently wide feed bands undergo no change in concentration but a fall in band width, i.e., the volume of mobile phase occupied by the solute band is reduced. The reduction factor is (1 + k) where k is the mass distribution ratio (capacity factor). Narrower bands suffer partial reduction in both band width and concentration. On desorption at the outlet, however, the change is always in band width and not concentration. A perfect detector registers the true concentration-time profile of the band in the column if the solute mass fraction in the stationary phase is below 10-3 at the column outlet. The risks of stripping the stationary phase at high solute concentrations in analytical and preparative or production gas chromatography are compared.
    Additional Material: 4 Ill.
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  • 123
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 629-631 
    ISSN: 0935-6304
    Keywords: Preparative liquid chromatography, HPLC ; Chiral HPLC columns ; (-)-Gossypol ; Resolution of enatiomers ; 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
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  • 124
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 639-640 
    ISSN: 0935-6304
    Keywords: Gas chromatography, GC ; Flame ionization detector, FID ; Electron capture detector, ECD ; Effluent splitting ; Pesticides ; 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
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  • 125
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    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 647-647 
    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
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  • 126
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 593-595 
    ISSN: 0935-6304
    Keywords: High performance thin layer chromatography, HPTLC ; Fluorescence ; Prostaglandins ; 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
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  • 127
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    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 601-604 
    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
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  • 128
    ISSN: 0935-6304
    Keywords: Reaction gas chromatography/mass spectrometry, GC/MS ; Capillary columns ; Post-column hydrodesulfurization ; Cyclic sulfides ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This article describes a method that assists in structure determination of cyclic sulfides mixtures by GC/MS. The method involves the use of a gas-phase hydrodesulfurization microreactor (AP-56 catalyst, reaction temperture 300-315°C, hydrogen as a carrier and reagent gas) located between the capillary column (OV-17) and the mass spectrometer. The presence of a microreactor in such a position does not essentially affect the chromatographic separation achieved by using the capillary column. Combined analysis of the mass spectra registered for the original sulfides and the hydrodesulfurization products permits the structure determination of each effluent to be made more reliably. This is illustrated by the investigation of a reaction mixture containing the structural and geometric isomers of methyl-substituted thiabicyclononanes.
    Additional Material: 6 Ill.
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  • 129
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    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 637-638 
    ISSN: 0935-6304
    Keywords: Gas chromatography, GC ; Glass capillary columns ; Liquid crystal ; Polycyclic aromatic hydrocarbons (PAH) ; N,N′-Bis(p-butoxybenzylidene)-α,α′-bi-p-toluidine (BBBT) ; 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
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  • 130
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984) 
    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
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  • 131
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    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 703-706 
    ISSN: 0935-6304
    Keywords: Gas chromatography, GC ; Fused silica microbore columns ; Automated injection ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 5 Ill.
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  • 132
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 15 (1984) 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 133
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    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 15 (1984), S. A10 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 134
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Tests with MoS2-Coating to Improve the Emergency Operating Characteristics between Cam-Ring and Vanes of the Vane Pumps when Operating with Water Glycol FluidsThe relatively poor wear- and corrosion-protection properties of water glycol fluids. Lead to premature wearing of some hydraulic components. In this report we will show, how in the case of vane pumps with a special surface coating improved emergency operating characteristics can be achieved between the moving parts and thereby an increase in the service life of these pump.
    Notes: Das relativ schlechte Verschleißschutzvermögen sowie verminderter Korrosionsschutz von HFC-Flüssigkeiten führen bei einigen Bauelementen zu vorzeitigen Ausfällen. In diesem Bericht wird gezeigt wie man bei Flügelzellenpumpen durch eine entsprechende Oberflächen-Beschichtung eine Verbesserung der Notlaufeigenschaft zwischen den Gleit- bzw. Reibpartnern erreichen kann, und dadurch die Lebensdauer der Pumpen erhöht.
    Additional Material: 11 Ill.
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  • 135
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    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 15 (1984), S. 34-40 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Additional Material: 19 Ill.
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  • 136
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Simple Constitutive Equations for Multiaxial Creep of Non-linear Viscoelastic MaterialsIsochronous creep data in uniaxial tension, compression and shear were used to formulate and test constitutive equations for nonlinear viscoelastic materials with different creep response in simple tension and compression.
    Notes: Isochrone Kriechergebnisse aus einachsigen Zug-, Druck- und Schubversuchen werden zur Formulierung und Untersuchung von Stoffgleichungen für nichtlinearviskoelastische Werkstoffe mit unterschiedlichem Kriechverhalten bei Zug- und Druckbeanspruchung verwendet.
    Additional Material: 9 Ill.
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  • 137
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    Materialwissenschaft und Werkstofftechnik 15 (1984), S. A96 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 138
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    Materialwissenschaft und Werkstofftechnik 15 (1984), S. 427-435 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Corrosion Resistant Materials for Fluorine and Hydrogen FluorideAluminum and Duralumin are restistant against fluorine and hydrogen fluoride up to 600 and 700 K, respectively. The resistance of nickel and its alloys, particularly monel, against fluorine and hydrogen fluoride is fairly good up to 900 and 800 K. During the attack of nickel-chromium alloys by fluorine between 1000 and 1300 K, it appears an inner fluorination similarly to the inner oxidation.The resistance of titanium in water-free liquid fluorine at lower temperatures with 〈 0,3 mm · a-1 is comparable to that of nickel and monel. However, the corrosion of titanium in gaseous fluorine amounts at 377 K only 0,0082 mm · a-1. In spite of their limited resistance against fluorine and hydrogen fluoride, very pure molybdenum and tungsten are employed as construction materials in the rocket technology because of their large strength at high temperatures if fluorine-hydrogen and fluorine-hydrazine flames are used.Lanthanum and calcium borides are only little attacked by fluorine hydrazine flames between 1400 and 1800K; they are superior to all special grade alloys. The same is true in a lower temperature region (290-400 K) with fluorcarbon resins. Organic materials substitute in increasing extent metal alloys and non-renetal inorganic materials.
    Notes: Unter den Metallen sind Aluminium und Duralumin gegen Fluor und trockenen Fluorwasserstoff bis 600 bzw. 700 K beständig. Die Beständigkeit von Nickel und seiner Legierungen, insbesondere Monel, gegen Fluor und Fluorwasserstoff reicht sogar bis etwa 900 bzw. 800 K. Beim Angriff von Fluor auf Nickel-Chromlegierungen zwischen 1000 und 1300 K tritt auch eine innere Fluorierung ähnlich der inneren Oxidschichtbildung auf.Die Beständigkeit von Titan in wasserfreiem flüssigem Fluor ist bei niedrigen Temperaturen mit 〈 0,3 mm · a-1 vergleichbar mit der von Nickel und Monel. In gasförmigem Fluor aber beträgt die Korrosion von Titan bei 377 K nur 0,0082 mm · a-1. Trotz ihrer bedingten Beständigkeit gegen Fluor und Fluorwasserstoff werden reinstes Molybdän und Wolfram wegen ihrer Festigkeit bei hohen Temperaturen in der Raketentechnik beim Antrieb mit Fluor-Wasserstoff bzw. Fluor-Hydrazin eingesetzt.Lanthan- und Calciumboride widerstehen Fluor-Hydrazinflammen zwischen 1400 und 1800 K und sind allen Speziallegierungen weit überlegen. Dieses gilt auch im niedrigeren Temperaturbereich (290-400 K) für die Fluorcarbonharze. Organische Werkstoffe verdrängen immer mehr metallische und nichtmetallische anorganische Werkstoffe.
    Additional Material: 3 Ill.
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  • 139
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Einfluß der Kerb- und Proben-Größe auf die Dauerfestigkeit von Stahlproben - Überprüfung einiger BerechnungsverfahrenNeue, genauere Dauerversuche wurden für die Überprüfung von verschiedenen Berechnungsverfahren und für die Feststellung eines mehr sicheren Verhältnisses zwischen der Kerbwirkungszahl und dem Kerbradius angewendet. Es wurden Streubänder für die Abhängigkeit der Kerbempfindlichkeit βk/αk von dem Kerbradius für Stahlproben mit Formzahl αk ≤ 3,6 erhalten. Dabei wurden Versuchsergebnisse für große bauteilähnliche Proben mit großen Kerbradien auch eingezogen. Die Streubänder der Versuchspunkte wurden für vergütete und normalisierte Stähle separat dargestellt, aber die Ergebnisse von Umlaufbiege- und Zug-Druck-Versuchen wurden gemeinsam betrachtet.Die oberen und unteren Streubandgrenzen wurden analytisch mit Hilfe einer Zweiparameter-Formal vorgestellt. Diese berücksichtigt den Einfluß der Probengröße besser als die Formeln von Neuber, Peterson oder Stieler.
    Notes: New, more accurate fatigue test results were used for verification of different calculation methods and for establishing a more reliable relationship between the notch factor and the notch radius. Scatter bands for the dependence of the notch sensitivity KF/KT on the notch radius were obtained for steel specimens with stress concentration factors KT ≤ 3.6, with particular consideration of test results for large component similar specimens with large notch radii. The scatter bands of test points were ploted separately for tempered and normalized steels but the rotating-bending and tension-compression test results were considered together. Their upper and lower boundaries were expressed analytically with a two-parameter-formula. This formula takes better into account the notch-size effect than the formulas of Neuber, Peterson or Stieler.
    Additional Material: 10 Ill.
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  • 140
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    Materialwissenschaft und Werkstofftechnik 15 (1984) 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 141
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    Materialwissenschaft und Werkstofftechnik 15 (1984), S. 210-214 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Methods for Quality Control of Solid Rolled Automotive PartsAn economically satisfactory solution has not yet been found for the quality control of solid rolled automotive components. In order to be able to reduce the time (and therefore costs) between rolling and machining, a method is needed, which controls quality direct on the rolling machine.The following up-to-date methods are presently applied in BMW plants. Control of rolling machine, grading test, internal stress test, inspection card, ground surface finish and hardness tests. Other tests are made on the steering knuckles, such as destructive chemical tests, gloss test, Barkhausen effect, dimension check, fine structure analysis and magnaflux testing.The two methods, which up to no permit a qualitative statement, namely internal stress test and Woehler fatigue test, are very involved. According to our present state of research the dimension check and fine structure analysis are good alternatives, to be able to considerably reduce the testing time between rolling and machining. The Barkhausen effect is a very elegant, non-destructive testing method to determine the grade of solid rolled components by way of comparison with sample parts.
    Notes: Die Qualitätskontrolle von festgewalzten Pkw-Bauteilen ist zum gegenwärtigen Zeitpunkt noch nicht wirtschaftlich zufriedenstellend gelöst. Um die Zeit zwischen dem Walzvorgang und der Montagefertigung, und um die Kosten zu reduzieren, ist eine Methode erwünscht, die eine Überwachung der Qualität unmittelbar an der Walzmaschine erlaubt.Es werden zuerst die folgenden aktuellen bei BMW angewandten Methoden vorgestellt: Kontrolle der Walzmaschine, Einstufenversuch, Eigenspannungsmessung, Kontrollkarte, Schliff und Härteverlauf. Die weiteren Prüfverfahren werden an Achsschenkeln erprobt: zerstörendes chemisches Verfahren, Glanzgradmessung, Barkhausen-Effekt, Maßkontrolle, Feinstrukturanalyse und Magnatest.Die zwei Methoden, die bis jetzt eine qualitative Aussage erlauben, Eigenspannungsmessung und Wöhlerversuch, sind sehr aufwendig. Nach unserem gegenwärtigen Untersuchungsstand sind Maßkontrolle und Feinstrukturanalyse gute Alternativen, um die Prüfzeit zwischen dem Walzvorgang und der Montagefertigung deutlich reduzieren zu können. Der Barkhausen-Effekt stellt eine sehr elegante zerstörungsfreie Prüfmöglichkeit dar, die Güte eines festgewalzten Bauteils nach Vergleich mit Musterteilen ermitteln zu können.
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  • 142
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    Materialwissenschaft und Werkstofftechnik 15 (1984), S. A44 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 143
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    Materialwissenschaft und Werkstofftechnik 15 (1984), S. 223-229 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Surface Protection for Tanks and Constructions in Waste Water Purification PlantsThe composition of waste water from chemical plants often requires a suitable surface protection for the steel or concrete substrates of constructions in water purification plants. The use of a suitable protection system will be instrumental in economizing and will enhance the availability of the plant.To study the resistance against chemical waste water, extensive tests with different corrosion protection systems were carried out under servicelike conditions. The most suitable system was a solventless epoxy-polyamin coating. Some examples and experiences in service with this protective coating are discussed.
    Notes: Die Abwasserbeschaffenheit in chemischen Anlagen erfordert häufig den Einsatz eines geeigneten Oberflächenschutzes auf dem Stahl- oder Betonuntergrund von Bauwerken in Abwasserreinigungsanlagen. Die Wahl eines geeigneten Schutzsystems trägt längerfristig zu Kosteneinsparungen bei und erhöht die Verfügbarkeit der Anlage.In umfangreichen Versuchsreihen wurden unterschiedliche Materialien unter praxisorientierten Bedingungen bezüglich ihrer Eignung in Chemieabwässern getestet. Als am besten geeignet erwies sich ein lösemittelfreies Epoxidharz. Anwendungsbeispiele mit diesem System werden aufgeführt.
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  • 144
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    Materialwissenschaft und Werkstofftechnik 15 (1984), S. A52 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 145
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    Materialwissenschaft und Werkstofftechnik 15 (1984), S. 264-268 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Eine phänomenologische Theorie der Schädigungs- und Adaptionsprozesse in festen KörpernIn der vorliegenden Arbeit wird versucht, ein phänomenologisches Konzept zu entwickeln, um den Tragfähigkeitsverlust belasteter Werkstoffe infolge struktureller und geometrischer Veränderungen mit Hilfe von Schädigungs- und Adaptionsparametern zu formulieren. Dabei wird die Einbuße an Tragfähigkeit, die etwa durch Wachstum struktureller und geometrischer Imperfektionen sowie durch andere Entfestigungsvorgänge, entsteht, als Schädigung schlechthin bezeichnet. Die Reaktion des Werkstoffs, bei Einwirkung äußerer Felder der auftretenden Schädigung das Gleichgewicht zu halten, erfolgt durch Adaptionsvorgänge, z. B. Verfestigung. Beide Prozesse werden durch kinetische Gleichungen beschrieben und in einfachen Beispielen besprochen.
    Notes: In the present paper the attempt is made to develop a phenomenological concept based on the assumption that the mechanical resistance of the material decreases as result of the structural and geometrical changes which take place in the solids during loading. This model is described in terms of damaging and adaptation parameters. The growth of structural and geometrical imperfections, as well as other softening processes leading to the loss of the mechanical strength of the solid regarded here as damaging processes. These damaging processes can occur simultaneously with the processes of material resistance (for example, strain-hardening) to the aggressive action of the external load. Development of the damaging and adaptation processes is described by properly kinetic equations. Several simple typical examples are discussed.
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  • 146
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    Materialwissenschaft und Werkstofftechnik 15 (1984), S. 298-298 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 147
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigations to Determine and Evaluate Damage Processes of Adhesive Bonds by Means of Acoustic EmissionThe damage process in metal adhesive bonds under quasistatic loads was monitored by means of acoustic emission analysis (AEA). Metallographic investigations allow the correlation between acoustic emission data and microscopic failure processes in the bondline of single lap adhesive joints. The influence of specimen geometry on the initiation of damages is discussed for several types of adhesives. Furthermore the relation between the preparation of the adherent surface and the onset of acoustic emission is as well described as the influence of manufacturing defects on the mechanical behaviour and the acoustic emission activity.
    Notes: Der Schädigungsablauf an einschnittig überlappten Klebverbindungen wurde mit Hilfe der Schallemissionsanalyse bei quasistatischer Belastung untersucht. An verschiedenen Klebstoffsystemen wird der Einfluß der Fügeteilgeometrie auf die Festigkeit und die Initiierung von Schäden in der Klebschicht dargestellt. Licht- und rasterelektronen-mikroskopische Gefügeuntersuchungen ermöglichen die Zuordnung der Schallemissionssignale zu den mikroskopischen Schädigungsvorgängen in der Klebschicht. Weiterhin wird der Zusammenhang zwischen der Fügeteilvorbehandlung und dem Beginn der Schädigungsausbildung sowie der Einfluß von Fertigungsfehlern auf die mechanisch-technologischen Eigenschaften von Metallklebungen diskutiert und Belastungsgrenzen aufgezeigt.
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  • 148
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    Materialwissenschaft und Werkstofftechnik 15 (1984), S. 299-308 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The Effect of Moisture on the Mechanical Properties of Phenolic Moulded MaterialsIn order to use thermosetting moulding material it is necessary to know how the mechanical properties are changed by absorption of water. Therefore, multiphase systems based on phenolic resin, with varying quantities of wood flour and/or powdered minerals as fillers, were examined. The relationship between moisture absorption and the change in Young's modulus, flexural strength and the strain of the outer fibre at fracture was determined. It could be shown that the increase in flexural strength as water absorption began is a result only of the swelling stress.
    Notes: Voraussetzung für den Einsatz duroplastischer Formstoffe in erhöhter Umgebungsfeuchte ist die Kenntnis der durch die Feuchteaufnahme bewirkten Änderung der mechanischen Werkstoffeigenschaften. Ausgehend von in ihrer Zusammensetzung variierten Mehrstoffsystemen auf der Basis Phenolharz/Holzmehl/Gesteinsmehl wird die formstoff- und feuchtespezifische Wechselwirkung zwischen Feuchteaufnahme, Biege-E-Modul, Biegefestigkeit und Randfaserdehnung beim Bruch aufgezeigt, und nachgewiesen, daß der zu Lagerungsbeginn zu beobachtende Anstieg der Biegefestigkeit ausschließlich auf durch Sorption hervorgerufene Druck-Eigenspannungen zurückzuführen ist.
    Additional Material: 6 Ill.
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  • 149
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    Materialwissenschaft und Werkstofftechnik 15 (1984) 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 150
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    Materialwissenschaft und Werkstofftechnik 15 (1984), S. 349-359 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The Swelling Behaviour of Thermosetting MaterialsThe moisture absorption of moulded materials can endanger a construction because of the change in volume of various parts. Therefore it is necessary to know the maximum possible swelling of the moulded materials employed at different relative humidities. The swelling of modified phenolic resin systems are described. Wood flour (which absorbs moisture) and powdered minerals (which in this case can be considered as inert) were used as fillers.Different methods have been developed to calculate the maximum possible swelling after a relatively short testing time (ca. 1000 h).
    Notes: Die Feuchteaufnahme eines Formstoffes kann durch die damit verbundene Volumenänderung des Formteils die Funktion einer Baugruppe gefährden. Daher muß die maximal mögliche formstoff- und umgebungsfeuchtespezifische Quelldehnung der eingesetzten Formstoffe bekannt sein. Am Beispiel von Ein-, Zwei- und Dreistoffsystemen mit Phenolharz als Matrixwekstoff wird der Einfluß der Harzträger Holzmehl (im Hinblick auf die Feuchteaufnahme „aktiv“) und Gesteinsmehl („inaktiv“) auf die Quellung untersucht. In diesem Zusammenhang werden Methoden aufgezeigt, die eine Abschätzung der maximal möglichen Quelldehnung nach relativ kurzer Versuchsdauer (etwa 1000 h) ermöglichen.
    Additional Material: 6 Ill.
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  • 151
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    Particle and Particle Systems Characterization 1 (1984), S. 14-21 
    ISSN: 0934-0866
    Keywords: Chemistry ; Industrial Chemistry and Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Mandelbrot has extended the concept of classical dimensional description of physical systems to include fractional values which describe the ruggedness of a structure. Thus if one has a dimension of 1.2 one knows that one is dealing with a line which fills space more efficiently than a line which has dimension of 1.1. A mathematical curve which exhibits ideal fractal structure has the same appearance when viewed at any level of scrutiny. Kaye and co-workers applied the concept of fractal mathematics to the description of the boundaries of fineparticle profiles. As demonstrated in this communication a natural fractal boundary in contrast with an ideal fractal can exhibit different fractal structures over different ranges of scrutiny. As a consequence one should always report the scale of scrutiny employed when examining the fractal structure of natural boundaries. Data is presented demonstrating the fractal/euclidean boundary structure manifest by aluminum shot fineparticles examined at various levels of scrutiny. The relationship between fractal descriptors of fineparticle boundaries and the Fourier analysis of geometric signature waveforms for describing the structure of fineparticles is explored. Data presented by Flook on the physical significance of the various co-efficients of a Fourier analysis of a signature waveform is correlated with the fractal description of the ruggedness of a profile.
    Additional Material: 11 Ill.
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  • 152
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    Particle and Particle Systems Characterization 1 (1984), S. 37-43 
    ISSN: 0934-0866
    Keywords: Chemistry ; Industrial Chemistry and Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Iterative numerical analysis methods, similar to those used for ray tracing in electron and ion guns, have been employed to calculate the electrical potential distribution in the vicinity of the orifice of an electrical sensing zone (esz) instrument. In particular, the electrical potential across the mouth of the orifice is considered and the effects of numerically bevelling the sharp peripheral edge are demonstrated.The results support the empirical equation: \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm d}\phi {\rm /d}x \sim 1 + \alpha '\{(r/R)/(1 - r/R)\} ^{\beta '} $$\end{document} for the axial component of the potential gradient, dφ/dx, at the mouth of the orifice expressed as a function of the radial distance, r, from the centre of the orifice of radius R; α′ and β′ are empirical constants. This equation was derived from previously reported experimental data on relative shifts and heights of artefact peaks apparent on the coarse side of size distributions measured via the esz method on a series of latex copolymers.
    Additional Material: 9 Ill.
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  • 153
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    Particle and Particle Systems Characterization 1 (1984), S. 74-77 
    ISSN: 0934-0866
    Keywords: Chemistry ; Industrial Chemistry and Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The evaluation of particle size distributions of comminution products often shows that the experimental distributions cannot be represented by one of the well-known functions (GGS, RRSB, log-normal distributions). Although in some cases a more or less satisfactory approximation to one of these functions can be made, a physically meaningful interpretation is generally impossible. Using the frequency curve, it can often be shown that mixed distributions, represented by several statistical assemblies, do exist. In this paper the progeny size distributions of quartzite formed by slow compression comminution of single grains and particle beds as well as of the comminution products of a roller mill are interpreted as superpositions of several statistical assemblies each of which can be represented by a truncated log-normal distribution.
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  • 154
    ISSN: 0934-0866
    Keywords: Chemistry ; Industrial Chemistry and Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: An apparatus is described for the fast and automatic measurement of the grain size distribution of sand ranging from 0 to 4 mm. A sample of sand continuously introduced at a rate of 30 g/min is separated by the apparatus into seven fractions of 0-0.063, 0.063-0.125, 0.125-0.25, 0.25-0.5, 0.5-1, 1-2, and 2-4 mm. The amount of sand in each of these fractions is determined and the results are given in time intervals of 1 minute. The sand is separated in a separation chamber through which water streams in a horizontal laminar flow. The samples are separated according to their settling velocities. The four coarse fractions descend to the bottom of the chamber. They are collected and weighed under water. The three fine fractions remain suspended in three effluent water streams. The quantity of sand is measured in flow cells by absorption of laser light. Control of the system as well as the collection and processing of the measured data are done by means of an electronic control unit and a microcomputer.
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  • 155
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    Particle and Particle Systems Characterization 1 (1984), S. 96-101 
    ISSN: 0934-0866
    Keywords: Chemistry ; Industrial Chemistry and Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The principle of an instantaneous reading, respirable dust, photometer and its application are described. The instrument measures the infrared light (940 nm wavelength) scattered on airborne particles under a mean scattering angle of 70°. Its open measuring chamber, which is insensitive to daylight, is filled with total dust. The photometer reading, however, is calibrated in terms of mass concentration of respirable dust by means of a gravimetric respirable dust sampler. Experiments carried out with monodisperse test aerosols and with real dusts confirm the instrument's principle. The photometer values obtained for real dusts can be linearly converted into mass values of respirable dust as long as ultra-fine or ultra-coarse dusts are excluded. In several practical cases an increased flux of scattered light is compensated for by a higher density of the dust material.
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  • 156
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    Particle and Particle Systems Characterization 1 (1984), S. 112-116 
    ISSN: 0934-0866
    Keywords: Chemistry ; Industrial Chemistry and Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The application of a new LDA method which simultaneously measures the size and velocity of small water droplets in the spray cone of a fan type water nozzle is described. As the phase difference between adjacent photomultipliers responding to signals from a fringe mode LDA is linearly proportional to the diameter of the spherical particle in the measuring volume, the new instrument allows, for long distances between the optical devices and the measuring volume in the spray, non-invasive measurements and from these the correlation of size and velocity of the individual droplet in order to establish two-dimensional distributions. From the new LDA instrument one receives definite information about the volume-flow concentration in the measuring point of an enclosed flow situation.
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  • 157
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    Particle and Particle Systems Characterization 1 (1984), S. 137-142 
    ISSN: 0934-0866
    Keywords: Chemistry ; Industrial Chemistry and Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Deep-sea manganese nodules must be potentially valuable one of the most mineral resources containing several economically valuable metal elements. Manganese minerals in the nodules are regarded principally as todorokite and δ-MnO2. The todorokite phase is porous and enriched in copper and nickel, while the porous δ-MnO2 phase is enriched in cobalt. Porosity and adsorption as well as dissolution characteristics have been observed for each constituent mineral. Furthermore the pore diffusion coefficient has been calculated. Moreover, the zeta potential of each constituent mineral has been measured in order to evaluate the electrochemical property. This has been applied successfully to the selective concentration of copper and nickel bearing or cobalt bearing minerals in deep-sea manganese nodules.
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  • 158
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    Journal of High Resolution Chromatography 7 (1984), S. 142-143 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Solute focussing ; Solvent effect ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
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    Journal of High Resolution Chromatography 7 (1984), S. 153-154 
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Silanized silica for HPLC ; Surface silanol groups ; Dimethylzinc tetrahydrofuranate ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
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  • 160
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    Journal of High Resolution Chromatography 7 (1984), S. 156-157 
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; HPLC profiling ; Prostaglandins ; High speed HPLC ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
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  • 161
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    Journal of High Resolution Chromatography 7 (1984), S. 151-152 
    ISSN: 0935-6304
    Keywords: Micro HPLC ; Multichannel photodiode array detector ; Components in a medicine ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
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  • 162
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    Journal of High Resolution Chromatography 7 (1984), S. 161-164 
    ISSN: 0935-6304
    Keywords: High-performance-thin layer chromatography, HPTLC ; Zirconium oxychloride ; Backside fluorodensitometric detection on TLC plate ; Content uniformity test for lanatoside C tablets ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
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  • 163
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    Journal of High Resolution Chromatography 7 (1984), S. 172-184 
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 11 Ill.
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  • 164
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    Journal of High Resolution Chromatography 7 (1984), S. 215-217 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, fused silica ; Coupled columns ; Halogenated organic pollutants ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
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  • 165
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    Journal of High Resolution Chromatography 7 (1984), S. 225-226 
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 166
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    Journal of High Resolution Chromatography 7 (1984), S. 211-212 
    ISSN: 0935-6304
    Keywords: Thin layer chromatography, TLC ; Alkylchlorosilanes ; Phosphatidylcholines ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
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  • 167
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    Journal of High Resolution Chromatography 7 (1984), S. 218-219 
    ISSN: 0935-6304
    Keywords: High-speed micro-HPLC ; Rapid Identification ; Polycyclic aromatic hydrocarbons ; Environmental sample ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
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  • 168
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    Journal of High Resolution Chromatography 7 (1984), S. 222-224 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Interface ; Partition ; Adsorption ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
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  • 169
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    Journal of High Resolution Chromatography 7 (1984), S. 232-244 
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 8 Ill.
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  • 170
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    Journal of High Resolution Chromatography 7 (1984), S. 252-257 
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: After having witnessed, over a period of more than 20 years, the extremely difficult early development of capillary gas chromatography, the growth of scientific understandign, and finally its sudden blossoming into a commonly accepted technique, the author is confronted with a dichotomy. On the one hand, there are the dramatic advances in the fields of column preparation, and of sampling techniques. Implementation of these advances should logically result in correspondingly drastic progress in the average quality of application work in drastic progress in the average quality of application work in capillary gas chromatography. On the other hand, however, such progress is lacking. The greater the practical potential, the smaller the fractionm of that potential which is practically exploited. The reason is that most users interpret te recent advances as exempting them from their obligation to know and think about the many details of practical work, and to attempt standardized work with standard columns and techniques. Standardization of routine work is beneficial, provided the standards are optimized-a condition which all too often remains unfulfilled. Research work, performed in a realm of ever new and unknown conditions, is of poor quality when done by standardized means. Since the most critical part of optimization is column selection, the capillary column must be mastered as a familiar tool in the hands of the investigator. This is hardly possible in the absence of any direct contact with column technology.
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  • 171
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    Journal of High Resolution Chromatography 7 (1984), S. 258-264 
    ISSN: 0935-6304
    Keywords: Gas-liquid chromatography ; Packed and capillary columns ; Plasma anaysis ; Pharmacokinetic studies ; Benzodiazepines ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A sensitive gas-liquid chromatographic assay was developed for plasma determinations of flurazepam (F), N1-desalkylflurazepam (DF), and N1-hydroxyethylflurazepam (HF). The internal standards used were delorazepam for F and DF and 1 ã-hydroxymidazolam for HF. Following extraction and derivatization for HF, these compounds were analyzed by ECD-GLC, using either glass packed columns (poly A 103 for F and DF, OV 225 for HF) or CP-Sil 5 capillary columns for DF and HF. The detection limit of the packed-column assay was approximately 3ng/ml for HF and DF, and 5ng/ml for F; with capillary GLC analysis, the sensitivity limit for HF and DF was lower than 1 ng/ml. These methods were used for pharmacokinetic investigations after i. v. administration of these compunds.
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  • 172
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    Journal of High Resolution Chromatography 7 (1984), S. 276-278 
    ISSN: 0935-6304
    Keywords: HPLC, Packed microbore columns ; Band broadening and flow rate ; Calculated van Deemter plot ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 173
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    Journal of High Resolution Chromatography 7 (1984), S. 282-283 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Gas analysis ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 174
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    Journal of High Resolution Chromatography 7 (1984), S. 286-288 
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 175
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    Journal of High Resolution Chromatography 7 (1984), S. 296-300 
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 9 Tab.
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  • 176
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    Journal of High Resolution Chromatography 7 (1984), S. 306-311 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary columns ; Thermodesorption ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A commercial thermodesorption and cold trap unit can be used as a large sample volume injection device in high resolution gas chromatography. Volumes of more than 100 μl can be injected. More than 97% of solvents, such as hexane, can be removed by a Tenax TA precolumn without any loss of compounds with volatilities comparable to naphthalene. Experimental conditions, recovery rates of polycyclic aromatic hydrocarbons, and the reproducibility of the method are described in detail. The method was successfully applied for the determination of PAH in air particulate matter extracts.
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  • 177
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    Journal of High Resolution Chromatography 7 (1984), S. 333-333 
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 178
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    Journal of High Resolution Chromatography 7 (1984), S. 334-335 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Fused-Silica columns ; Thermal stability ; Dibenzothiophene oxides ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
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  • 179
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    Journal of High Resolution Chromatography 7 (1984), S. 411-413 
    ISSN: 0935-6304
    Keywords: Packed capillary columns ; Miniaturized gradient elution ; Polynuclear aromatic hydrocarbons ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A miniaturized continuous gradient elution system was designed for work with packed capillary columns. The retention reproducibility achieved is adequate for many practical applications.
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  • 180
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    Journal of High Resolution Chromatography 7 (1984), S. 461-465 
    ISSN: 0935-6304
    Keywords: Gas chromatography, GC ; Capillary columns ; Retention gaps ; Peak broadening ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A simple formula is derived which allows estimation of the band broadening due to longitudinal diffusion in retention gaps for isothermal runs with the column held at the injection temperature. The broadening is strongly dependent on the linear gas velocity in the retention gap. If the internal diameters of the retention gap and the separation column are similar, the retention gap may have a length exceeding 100 m, even if the separation column is only 10 m long. A 0.5 mm I.D. retention gap attached to a 0.3 mm I.D. separation column (of interest for automatic on-column injection) may be several meters long. Retention gaps of 0.3 mm I.D. may be used for on-column injections into separation columns with I.D's. down to about 0.1 mm.
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  • 181
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    Journal of High Resolution Chromatography 7 (1984), S. 477-479 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Glass capillary column ; Adsorbent ; Cold trapping ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
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  • 182
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    Journal of High Resolution Chromatography 7 (1984), S. 414-422 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary columns ; Steroid analysis ; Sample pretreatment ; Sample introduction ; Separation speed ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Quantitative analysis of steroids and their metabolites in urine samples calls for increased speed of sample clean-up, of the derivatization procedure, and of separation. A fast procedure for sample pretreatment, which can be performed within 8 hours, is introduced and evaluated. It is shown that use of fast pretreatment in combination with narrow bore columns, which are compatible with existing instrumentation, can considerably increase, laboratory throughput. The effect of different sample introduction techniques (e.g. splitless, on-column, and moving needle) on column efficiency and resolution is demonstrated and discussed.
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  • 183
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    Journal of High Resolution Chromatography 7 (1984), S. 435-435 
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 184
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; General methods of nucleotide HPLC ; Molecular and ionic basis of separation ; Two-dimensional separation ; Stationary phase; selectivity to nucleotide size and composition, selectivity control ; Mobile phase (solvent, salt, pH), influence on retention and selectivity ; Guard-column functions ; Column loadability and packing, consolidation of bed particles ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In order to develop efficient separation methods for nucleotides according to their size and heterocyclic composition, the application of ion-exchange, reverse-phase, and normal-phase adsorption HPLC has been studied. The comparative investigation of retention power and selectivity of various packings (non-polar bonded-phase and amino silicas) in relation to nucleotide length and composition yields data which enable suitable packings to be selected and a method of preparing the new packing for a particular separation problem to be formulated. Thus a new anion exchanger with high selectivity and dynamic mass transfer has been prepared for fractionation of large oligonucleotides. The effect of the eluent pH and composition (organic modifier, salt) on retention, selectivity, and resolution in ion-exchange and reverse-phase HPLC has been studied. The optimum separation conditions comprise elution with oppositely directed gradients of the salt and the modifier, use of a precolumn packing that provides the best protection for the main column without loss of its efficiency, and the optimum gradient program for the desired retention of the component of interest. The relation between loading and sample concentration has been studied and the system for gradient elution improved. Our work shows that two-dimensional separation is the most reliable and informative method for preparation of homogeneous oligonucleotides. The hydrophobic-pair ion-exchange mechanism is proposed for ion-pair chromatography. Protected and partially deblocked oligonucleotides, chemically synthesized for genetic engineering studies, have been separated with high selectivity by adsorption (normal-phase) HPLC which is efficient for gradient elution with isohydric eluents. The analysis of a monomeric composition of nano-(pico-) molar amounts of oligonucleotides has been developed; the procedure involves microcolumn digestion of the oligonucleotides with immobilized enzymes followed by microcolumn separation of the nucleoside-mononucleotide mixture. Also, a new slurry method for packing stable HPLC columns with a tightly consolidated, nonshrinkable bed of particles has been developed.
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  • 185
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    Journal of High Resolution Chromatography 7 (1984), S. 492-494 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; Closed loop stripping analysis ; Filter extraction ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
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  • 186
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    Journal of High Resolution Chromatography 7 (1984), S. 587-589 
    ISSN: 0935-6304
    Keywords: Gas chromatography, GC ; Packed glass columns ; Solvent extraction ; Plastics ; Ethylene oxide ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
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  • 187
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    Journal of High Resolution Chromatography 7 (1984), S. 597-598 
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 188
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    Journal of High Resolution Chromatography 7 (1984), S. 538-539 
    ISSN: 0935-6304
    Keywords: Thin-layer chromatography, TLC ; Alkylchlorosilanes ; Prostaglandins ; Hydroxyelcosatetraenoic acids ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
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  • 189
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    Journal of High Resolution Chromatography 7 (1984), S. 549-552 
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 190
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    Journal of High Resolution Chromatography 7 (1984), S. 566-569 
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Electrochemical detection ; Serum ; Tetraiodothyronine ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Tetraiodo-L-thyronine (T4) in human serum was determined by HPLC using a nonphysiological internal standard. For sample preparation, a cation exchange resin, RP-chromatography on C-18 or phenylphase, and electrochemical detection (Metrohm 656 or BAS-LC 4 A) were employed. The mobile phase (0.8 ml/min) was 10 mM H3PO4/CH3OH (40/60 v/v) or 10 mM H3PO4/CH3CN (70/30 v/v, 1.5 ml/min), the voltage applied 800 mV. The coefficient of variation (day to day) was 6.8% (N = 40); concentrations of T4 found were 11 to 20% lower than those obtained by two different commercially available immunoassays.
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  • 191
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    Journal of High Resolution Chromatography 7 (1984), S. 578-579 
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    Keywords: Gas chromatography, GC ; Capillary columns ; Effluent splitter, all glass type ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
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  • 192
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    Journal of High Resolution Chromatography 7 (1984), S. 590-592 
    ISSN: 0935-6304
    Keywords: Pressurized gas ; Supercritical fluid ; Elution and resolution behavior ; n-Pentane ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 6 Ill.
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  • 193
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    Journal of High Resolution Chromatography 7 (1984), S. 599-599 
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 194
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    Journal of High Resolution Chromatography 7 (1984), S. 660-670 
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 6 Ill.
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  • 195
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    Journal of High Resolution Chromatography 7 (1984), S. 697-699 
    ISSN: 0935-6304
    Keywords: Gas chromatography, GC ; Capillary columns, 100 μm I.D. ; On-column injector ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 5 Ill.
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  • 196
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    Journal of High Resolution Chromatography 7 (1984), S. 707-709 
    ISSN: 0935-6304
    Keywords: Supercritical fluid chromatography, SFC ; Diffuse reflectance infrared spectrometry ; Fourier transform infrared spectrometry ; Spectrometry/chromatography interface ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
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  • 197
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    Journal of High Resolution Chromatography 7 (1984), S. 577-577 
    ISSN: 0935-6304
    Keywords: Multidimensional gas chromatography, MGC ; Deans System ; Temperature programming ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
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  • 198
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    Journal of High Resolution Chromatography 7 (1984), S. 584-586 
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Normal and reversed phases ; Steroid esters ; Long-acting contraceptive ; Injectable contraceptives ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
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  • 199
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    Journal of High Resolution Chromatography 7 (1984), S. 714-715 
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Bonded phases ; Charge-transfer interaction ; n-Propyl picryl ether ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
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    Journal of High Resolution Chromatography 7 (1984), S. 709-711 
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Electrochemical detection ; Phenylenediamines ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
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