Wall-coated open-tubular column chromatography on an organo-clay stationary phase

被引：13

作者：

Bruno, TJ ^{[1
]}

Lewansowska, A ^{[1
]}

Tsvetkov, F ^{[1
]}

Miller, KE ^{[1
]}

Hanley, HJM ^{[1
]}

机构：

[1] Natl Inst Stand & Technol, Phys & Chem Properties Div, Chem Sci & Technol Lab, Boulder, CO 80305 USA

来源：

JOURNAL OF CHROMATOGRAPHY A | 2002年 / 973卷 / 1-2期

关键词：

stationary phases; GC; enthalpy of interaction; wall-coated open-tubular columns; organo-clay complex; hydrocarbons; laponite; cetyltrimethylammonium bromide;

D O I：

10.1016/S0021-9673(02)01124-X

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

Wall-coated open-tubular (WCOT) column chromatography is shown to be a viable tool to measure hydrocarbon interactions with an organo-clay as the stationary phase. In this paper, we report the heats of interaction for a series of hydrocarbons (n-alkanes of C-6-C-12, and cyclohexane) on a cetyltrimethylammonium bromide (CTAB)-modified Laponite-RD clay. The measurements were performed with a new WCOT method that we have developed, and also a conventional packed-column approach. Although the measurements from both techniques yield the same values of enthalpy (on the basis of our statistical analysis), we argue that WCOT column chromatography gave the more reliable results, with lower uncertainties and better chromatographic behavior. Published by Elsevier Science B.V.

引用

页码：143 / 149

页数：7

共 22 条

[1] Determination of heats of adsorption of hydrocarbons on a synthetic clay by gas-solid chromatography using a wall coated open tubular column approach [J].