Preparation and characteristics of two new GC stationary phases-dihydroxy crown ether containing polysiloxane |
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| Authors: | Z -R Zeng C -Y Wu H Yan Z -F Huang Y -T Wang |
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| Institution: | (1) Department of Chemistry, Wuhan University, 430072 Wuhan, P.R. China;(2) Department of Environment Science, Wuhan University, 430072 Wuhan, P.R. China |
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| Abstract: | Summary Two new kinds of crown ethers: 3,5-dibutyl-unsymmetrydibenzo-14-crown-4-dihydroxy (cis-, and trans-) with the OH-terminal silicone oil in different proportion were coated on glass capillary columns, and immobilized by condensation using a coupling agent of alkyltrimethoxysilane. Chromatographic characteristics, including column efficiency, polarity, selectivity, phase transition temperature and thermal stability were studied. The columns were compared with PEG-20M in terms of polarity and selectivity. The immobilization and retention mechanisms are also discussed. |
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| Keywords: | Gas chromatography Dihydroxy crown ether stationary phases Immobilization by condensation |
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