Abstract
High-resolution gas chromatography with liquid crystal glass capillaries. III. Separation of hydrocarbon isomers on cholesteric mesophase high-performance glass capillary columns with cholesteryl butyrate as stationary phase were applied for separations of isomeric alkylbenzenes and n-alkenes in cholesteric, crystalline, isotropic and supercooled range. Structure-retention correlations, retention indices, d I/d T values and homomorphy factors are discussed. The cholesteric modification shows a higher selectivity for trans- cis-isomeric n-alkenes, than nematic and smectic mesophases or common stationary phases.
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