Preparation and gas chromatographic characterization of some crown-ether stationary phases.
Three open tubular glass capillary Chromatographic columns containing poly(vinylbenzo-15-crown-5), vinylmethylsila-17-crown-6, and vinylmethylsila-14-crown-5 have been prepared and characterized. The silacrown-ether stationary phases were polymerized inside the capillary and copolymerized with a methacryloxysilane bound to the inner surface. The poly(vinylbenzo-15-crown-5) was prepared and used as a coating in a capillary which had been roughened and deactivated. Characterization was performed by use of gas chromatography and included determination of column bleed character, phase transition changes, polarity and selectivity. Differential scanning calorimetry confirmed the phase transition temperature of the poly(vinylbenzo-15-crown-5) phase. The polarity and selectivity of these phases are comparable to those of Carbowax 20M.
Fine
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Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, U.S.A.
Gearhart
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Mottola
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