2-SOLUTE METHOD FOR INDICATING POLARITY CHANGES OF CONVENTIONAL AND NOVEL GAS-CHROMATOGRAPHIC STATIONARY PHASES WITH TEMPERATURE INCREASE

被引：13

作者：

BETTS, TJ

机构：

[1] School of Pharmacy, Curtin University of Technology, GPO Box U 1987, Perth

来源：

JOURNAL OF CHROMATOGRAPHY | 1993年 / 628卷 / 01期

关键词：

D O I：

10.1016/0021-9673(93)80341-5

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

This author's previous work suggested that a ratio of corrected retention times for cuminal (cu) against caryophyllene (cy) pragmatically indicated the polarity of a gas chromatographic stationary phase. A c ratio of 3cu/4cy below 0.8 corresponded to low-polarity phases, and above 1.2 to high-polarity ones. Changes in the c ratio for liquid crystal, toroid molecular and conventional phases were observed with increases in temperature, particularly for Carbowax 20M, which appeared to decline considerably in polarity. Some high-polarity liquid crystals were reduced to intermediate polarity c ratios (0.8-1.2). Previous anomalous observations by this author can now be explained.

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页码：138 / 142

页数：5

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