Abstract
By in situ photopolymerization of acrylates, thick polyacrylate films can be immobilized in 10-μm fused-silica capillaries. Up to 1.9-μm thick films can be produced in 0.3–1.2 m long capillaries, resulting in phase ratios > 1.0 and leading to columns with high mass loadability. Owing to the high mass loadability, application of “on-column” UV detection is possible. The effect of incorporating alkyl acrylates in the film on retention behaviour and efficiency was extensively investigated. The success rate of the preparation of silicone—ethylhexyl acrylate films is almost 100%. The polyacrylate films are stable towards basic solutions up to pH 12. The column efficiency is demonstrated with separations of anthracene derivatives. A fast separation of methyl-substituted benzenes with on-column UV detection is shown.
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