Abstract
Two methods are described for the immobilization of polyethylene glycol. Immobilization was achieved by reaction with methyl(vinyl)cyclopentasiloxane (V5) and dicumyl peroxide or ethylene oxide. Fused-silica capillaries coated with V5-immobilized polyethylene glycol 40M could be used over a wide temperature interval, 30–300°C. Further, immobilization makes feasible the use of thick films. The utility of this column type is demonstrated by several examples. Especially notable is the excellent performance achieved with water solutions and also free acids.
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