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Retention behaviour of carboxylic acid methyl esters in supercritical fluid chromatography
Author(s) -
Shen YuFeng,
Wang QingHai,
Zhu DaoQian,
Zhou LiangMo
Publication year - 1994
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19940120206
Subject(s) - chemistry , supercritical fluid , supercritical fluid chromatography , chromatography , stationary phase , carboxylic acid , entropy (arrow of time) , high performance liquid chromatography , organic chemistry , thermodynamics , physics
The study on retention behavior in supercritical fluid chromatography (SFC) is necessary to understand the mechanism of the various interactions in SFC. The retention of SFC in carboxylic acid methyl ester/polymethylsiloxane/CO 2 system was studied systematically and the retention behavior of this kind of compounds under various typical operation conditions was described using the method of an alternative unified theory of chromatographic retention. The results illustrated that expression: Ink = a + b/T + cp + dp/T + ep 2 /T can be used to describe quantitatively the retention behavior of carboxylic acid methyl ester/polymethylsiloxane/CO 2 system in the ranges of reduced density from 0.549 to 1.411. It was also found that the entropy of solute in stationary phase is dependent on the density of supercritical fluid (SF) under typical operating conditions of SFC.