✦ LIBER ✦

Effect of enthalpy on structure-relation correlation in capillary gas chromatography

✍ Scribed by Hanai, Toshihiko

Publisher: John Wiley and Sons
Year: 1990
Tongue: English
Weight: 299 KB
Volume: 13
Category: Article
ISSN: 0935-6304
DOI: 10.1002/jhrc.1240130308

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✦ Synopsis

Abstract

The retention times of 24 alkanes, 11 olefins, 17 alkyl alcohols, 30 fatty acid methyl esters, and 8 polyaromatic hydrocarbons were measured on two non‐polar and two polar capillary columns at different temperatures. The enthalpy of these compounds was calculated from the Van't Hoff plot.

The log k′s and enthalpies of each group of compounds showed individual linear relations. The relation of the enthalpy and Van der Waals volume was similar to that of log k′ and Van der Waals volume, and differed from that of their log k′ and boiling point. Enthalpy thus indicates selectivity of columns.

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