Abstract
A procedure for the preparation of glass capillary columns using a bonded cyanosilicone rubber as stationary phase is presented. Two types of cyanosilicone pre-polymer were synthesized, with 25% and 100% cyano-substitution, respectively. Glass capillaries that had been leached with HCl or treated with a sodium chloride sol were coated with the pre-polymer, and a rubber was formed situ. Such columns show very good thermal stability up to 300°C; further, activity is low and the efficiency good. The utility of these thermally stable polar columns is demonstrated by the analysis of aldononitrile derivatives prepared from sugars and also polynuclear aromatics (PNAs), especially aza-PNAs.
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