Separation of fast anions by capillary electrophoresis without flow reversal

Anions with high electrophoretic mobilities (fast anions) cannot easily be separated on bare silica columns by capillary electrophoresis unless the electroosmotic flow is reversed. The materials used to reverse flow limit the selection of indirect chromophores as well as complicate the direct detect...

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Bibliographic Details
Published in:Journal of Chromatography A 1995-04, Vol.696 (2), p.349-352
Main Authors: Tindall, G.W., Perry, R.L.
Format: Article
Language:English
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Summary:Anions with high electrophoretic mobilities (fast anions) cannot easily be separated on bare silica columns by capillary electrophoresis unless the electroosmotic flow is reversed. The materials used to reverse flow limit the selection of indirect chromophores as well as complicate the direct detection of ions that do not need indirect detection. The availability of columns permanently coated to reduce electroosmotic flow could provide the means to separate fast anions without the need for a flow reversal agent. Useful separations of fast anions were achieved on commercially available silane-coated columns. These columns were particularly useful for the analysis of anions that could be detected by direct detection.
ISSN:0021-9673
DOI:10.1016/0021-9673(94)01229-8