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  • 1975-1979  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Chromatographia 8 (1975), S. 468-473 
    ISSN: 1612-1112
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The object of the present study was to determine the usefulness of averaging data obtained from repeated analyses in improving reproducibility of the results, both in terms of retention indices and peak area percentages and to find an optimal compromise between reproducibility and total analysis time. All the necessary calculations are performed by an off-line computer system using a digital integrator and punched tape obtained by a teletype. The standard deviation and the 95% tolerance limits for each peak area percentage in a multiple analysis are readily provided. Stray values are eliminated by means of the t-test.
    Type of Medium: Electronic Resource
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  • 2
    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
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