Journal
ELECTROPHORESIS
Volume 26, Issue 10, Pages 2019-2026Publisher
WILEY
DOI: 10.1002/elps.200410251
Keywords
capillary electrochromatography; enantiomeric separation; monolith; permethyl-beta-cyclodextrin
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By an on-column sol-gel process, a chiral monolithic stationary phase was prepared by the fusion of permethyl-beta-cyclodextrin-silica (Chira-Dex-silica) particles and by linking them to the internal capillary wall. The resulting monolith is stable toward voltage (30 kv) and pressure (300 bar) and possesses a high efficiency (up to 100 000 theoretical plates per meter). Efficient enantiomeric separation of various chiral compounds by pressure-supported capillary electrochromatography (CEC) was achieved. When comparing this method to capillary liquid chromatography (LC) employing the same column in an unified equipment, CEC shows a twofold higher column efficiency at comparable elution times and hence better resolution factors.
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