Abstract
β-Cyclodextrin has been immobilized on silica gel beads via three kinds of spacers. The retention behaviour of several disubstituted benzene derivatives on these phases and on their modified derivatives was investigated, as well as on stationary phases without β-cyclodextrin. The β-cyclodextrin stationary phase obtained from succinamidopropyl silica (whose unreacted carboxyl groups are not modified) is more efficient than the other β-cyclodextrin phases in the liquid chromatographic separation of the ortho, meta and para isomers. The unreacted carboxyl groups of the spacer arms do not interact significantly with solutes having various functional groups. The effects of ionic strength and column temperature on the retention were also studied briefly.
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