Abstract
A number of different cyano/ODS polymeric modified silica gel phases were prepared by simultaneous bonding of cyanoalkylsilanes and octadecylsilane. Cyano contents between 10–80% were obtained. High surface coverage (above 4 µmole/m2), as well as low hydroxyl content, characterised all phases. The modified silica was suitable for separations in both straight and reversed phase mode. Significantly reduced retention times were obtained in the reversed phase mode for high mole-cular weight polyaromatic compounds (Mw above 300).
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