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  • 1
    Electronic Resource
    Electronic Resource
    Gas chromatographic study of interactions between aliphatic amines and metallic ions (1970)
    s.l. : American Chemical Society
    Analytical chemistry 42 (1970), S. 1268-1271 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60293a010
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Thermodynamics of Tetra-n-octyltin+ hydrocarbon systems by gas-liquid chromatography (1992)
    Springer
    Journal of solution chemistry 21 (1992), S. 129-146 
    Details
    ISSN: 1572-8927
    Keywords: Tetra-n-octyltin ; hydrocarbon solutions ; activity coefficients ; gas chromatography ; Flory theory ; Sanchez-Lacombe theory ; excess enthalpy ; orientational order
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The activity coefficients of fifteen hydrocarbons at infinite dilution in tetra-n-octyltin were measured using gas-liquid chromatography at five temperatures between 40 and 60°C. Partial molar excess thermodynamic properties are calculated from the experimental results, and discussed within the framework of the equation of state theory of Flory and of the Ising fluid theory of Sanchez and Lacombe. Both theories results in binary mixture characteristic parameters (X12 and ΔP*, respectively) that decrease linearly with the temperature. The results may be interpreted by assuming that there is orientational order in pure tetra-n-octyltin and in pure n-alkanes, but not in the remaining solutes; the destruction of this order on mixing the hydrocarbons with the tin compound results in important contributions to the excess thermodynamic properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00647003
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Analysis of isomeric cresols by gas chromatography (1991)
    Springer
    Chromatographia 32 (1991), S. 457-460 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Cresol isomers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The analysis of isomeric cresols is difficult because of their similar volatilities and high polarities. The situation is specially complicated in the case of industrial synthesisplant samples because of the presence of phenol and of the very high concentration (about 90%) of p-cresol. A gas chromatographic method is described, employing columns packed with Bentone-34 plus Castorwax on diatomaceous supports; the best results are obtained using Chromosorb P AW DMCS. The symmetry of the peaks obtained is excellent for the type of solute.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02327978
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    A gas chromatographic study of the charge-transfer complexes formed between 1,3,5-trinitrobenzene and aromatic hydrocarbons (1973)
    Springer
    Chromatographia 6 (1973), S. 57-66 
    Details
    ISSN: 1612-1112
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Gas-liquid chromatography was used for studying the complexing equilibrium at 60°C between aromatic hydrocarbons and 1,3,5-trinitrobenzene (TNB) dissolved in dinonyl phthalate (DNP). On increasing the molar fraction of TNB in the stationary phase, a significant increase in the activity coefficients at infinite dilution was observed for several non-complexing solutes; said increase cannot be exclusively attributed to variations in the molar volume of the stationary phase. It appears to be evident that the activity coefficient of TNB varies appreciably with its concentration in DNP. A semiempirical method, combining theories for regular and athermal solutions, is applied for calculating the activity coefficient of uncomplexed solute in different stationary phases. The thermodynamic stability constants for the complexes can then be calculated by means of a series of relations that are fulfilled when the molar fraction of the additive tends to zero. Values thus obtained are compared with spectrophotometric data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02270539
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Determination of toluenesulfonic acid isomers by gas chromatography (1988)
    Springer
    Chromatographia 25 (1988), S. 618-620 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Toluenesulfonic acid isomer distribution ; Ethyl toluenesulfonate isomers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A gas chromatographic method for the determination of isomeric distribution in toluenesulfonic acid samples is described. The acids are transformed into the corresponding ethyl esters by reaction with triethyl orthoformate in toluene. The reaction mixture can be injected, without further purification, into the gas chromatograph. The separation is best performed on columns containing OV-210 or polyphenyl ether (6 rings) as the stationary phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02327658
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    Paper (German National Licenses)
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