Journal
ELECTROPHORESIS
Volume 28, Issue 15, Pages 2573-2579Publisher
WILEY
DOI: 10.1002/elps.200600773
Keywords
carbon nanostructures; chiral separation; ephedrines
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Single-walled nanotubes and multi-walled nanotubes (MWNTs) have been evaluated as chiral selectors for the enantiomeric separation of ephedrines by using EKC with surfactant-coated carbon nanotubes. The analysed compounds were (+/-)-ephedrine, (+/-)-norephedrine and (+/-)-N-methylephedrine. The potential of those carbon nanostructures as chiral selectors has been evaluated by changing different experimental variables such as pH, addition of organic modifiers, potential and injection time. The capability of MWNTs to resolve enantiomeric mixtures was demonstrated by using partial filling of the capillary with concentrated surfactant-coated MWNTs. Differences in the enantioselectivity were discussed.
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