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  • 1
    Electronic Resource
    Electronic Resource
    Improving the reproducibility of quantitative gas-liquid chromatography by modifying the injection system (1976)
    Springer
    Chromatographia 9 (1976), S. 601-604 
    Details
    ISSN: 1612-1112
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary In order to increase accuracy of split ratio measurements by interruption of the septum purge gas stream a gas chromatograph (GLC) sample injection system was modified by the introduction of a rapid-action gate-valve in the appropriate gas line. The effects of this modification are described. It is shown to improve the reproducibility of injected amounts in multiple analysis and thus the accuracy of quantitative determinations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02290528
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Simultaneous three-dimensional gas-liquid chromatography on wall-coated glass-capillary columns (1977)
    Springer
    Chromatographia 10 (1977), S. 438-443 
    Details
    ISSN: 1612-1112
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A new system for multiple simultaneous gas-liquid chromatographic analysis is described. A commercially available gas chromatograph was modified to accommodate three wall-coated glass-capillary columns. A novel design of both the injection port and sample splitter allows the admission of equal portions of the sample into each of the three columns from a single injection. This provides the analyst either with data for the sample in question on three different liquid phases, or with a single result in triplicate if the same liquid phase is used on all columns. This presentation briefly describes the geometry of the inlet system; details will be published shortly. The performance of this system is illustrated with a simple example. In an artificial mixture, the quantitative GLC-data of 6 compounds obtained on three different columns were unequivocally correlated. A correlation number (CN) is derived which gives the maximum possible number of compounds that can be theoretically correlated in a mixture by the system described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02257357
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Identification and quantitation of trace amounts of barbiturates with glass capillary gas chromatography (1979)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 2 (1979), S. 361-365 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; Sample preparation by pre-chromatographic reaction at the 7 microliter level ; Reproducibility of methylation and allylation of barbiturates ; Application to blood analysis ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Pre-chromatographic reactions are no longer a necessary evil. Equipment such as the microrefluxer now allows reproducible 7-μl-reactions to be carried out in a short time. Thus multiple derivatisations can be used together with glass capillary GC for routine identifications. The method has been succesfully applied to barbiturates. Retention data of their methyl-, allyl- and benzyl-derivatives are given.Quantitative blood level determinations are briefly discussed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240020619
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    Paper (German National Licenses)
    Fulltext
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