ISSN:
0935-6304
Keywords:
Capillary GC
;
Structure-retention correlation
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The retention time of 24 alkanes (Al-Al), 11 olefins (OI), 17 alkyl alcohols (Al-OH), 30 fatty acid methyl esters (FA) and 8 polyaromatic hydrocarbons (PAH) was measured on non-polar CP-Sil-5 and DB-1 and polar CP-WAX-52 and DB-WAX capillary columns at different temperatures.The correlation coefficients of the capacity ratios of each group of compounds and that of all the compounds together was excellent; however, there was some selectivity of different types of compounds when their capacity ratios were correlated with their Van der Waals volumes. The elution order of these compounds was Al-Al 〈 OI 〈 FA 〈 Al-OH 〈 PAH on both non-polar columns, while the retention of PAH was greater on the DB-1 column and those of other compounds were greater on the CP-Sil-5-column. Such selectivity was significant on polar columns.Further, the energy effect, which was used to make a retention index system in liquid chromatography, was obtained from their capacity ratios to make a retention index system for capillary column gas chromatography. The values of the energy effect of each group of compounds were quite constant compared to the values obtained in liquid chromatography. The selectivity of these capillary columns was further discussed from their capacity ratios, their Kováts retention indices, and their energy effect to make a prediction of retention time.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jhrc.1240120517
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