Comprehensive Two-Dimensional High-Speed Gas Chromatography with Chemometric Analysis
Autor: | and Bryan J. Prazen, Carsten A. Bruckner, Robert E. Synovec |
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Rok vydání: | 1998 |
Předmět: | |
Zdroj: | Analytical Chemistry. 70:2796-2804 |
ISSN: | 1520-6882 0003-2700 |
Popis: | High-speed comprehensive two-dimensional gas chromatography (GC×GC) is performed, in which a polar second column performs separations every half second on portions of the effluent from a nonpolar first column. Chemometric techniques that are traditionally used on chromatographic separations with multichannel detection are applied to two-dimensional chromatographic data, for the purpose of quantifying incompletely resolved peaks. Generalized rank annihilation method (GRAM) is evaluated in the quantification of varying amounts of selected overlapped analytes in a GC×GC analysis of modified white gasoline. GRAM requires a sample and standard data set for quantification, and the high retention time precision arising from use of shortened GC columns aids in the analysis. Results from GRAM analysis of GC×GC data are compared with a reference GC method. The test analytes ethylbenzene and m-xylene, existing in various proportions in white gasoline samples, were successfully deconvoluted despite having resolutions... |
Databáze: | OpenAIRE |
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