Abstract: A comparison study was made on the separation of carbon chain isomers of butanols with CH-B-15-C-5 as stationary phase in GSC, GLC and CL-GLC. The results of separation and the chromatographic characteristics of CH-B-15-C-5 are discussed. By determining the Mcreyoids phase constants, the polarity of the CH-B-15-C-5 column was known to be moderate to weak. In the CL-GLC system, CH-B-15-C-5 oc-curred as orderly arranged ether liquid crystals, and therefore, under similar experimental conditions, the resolu-tion of the CL-GLC was higher than that of the GLC, with the chromatographic peaks of the former also betterdefined. We presume that whether or not the stationary phase molecules are in ordered arrangement in the system has great impact on the retention behavior of organic compounds.

Key words: Liquid crystal, Gas chromatography, Isomer