✦ LIBER ✦

Evaluation of liquid crystal smectic mesophases for gas-liquid chromatographic separations

✍ Scribed by Jerome E. Haky; Gary M. Muschik

Publisher: Elsevier Science
Year: 1981
Tongue: English
Weight: 554 KB
Volume: 214
Category: Article
ISSN: 1873-3778
DOI: 10.1016/s0021-9673(00)98520-0

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✦ Synopsis

The gas chromatographic properties of the smectic and nematic mesophases of four well-characterized liquid crystals are reported_ Selectivity and resolution of anthracene and phenanthrene is greater at column temperatures corresponding to these liquid crystals' smectic A and smectic C phases than at those corresponding to their nematic phases. Peak broadening does not occur in the smectic A or smectic C phases.

but is seen in the smectic B phase. Separations of six polycyclic aromatic hydrocarbons and four polychlorinated biphenyls on the liquid crystal columns are compared. The results indicate a continuity of the mechanism of solute separation in the smectic A. smectic C and nematic phases. and demonstrate that these phases are useful in gas chromatographic analyses.

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