Modified methods for off- and on-line determination of electroosmosis in capillary electrophoretic separations

A.A.A.M. vd Goor, B.J. Wanders, F.M. Everaerts

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Abstract

Two modified methods for measuring the ¿-potential and electroosmotic flow in capillaries for electrophoretic or electrochrmatographic separations are discussed. Streaming potential measurements with computer control and data acquisition can be used off-line for rapid screening of the behaviour of capillaries. To test the equipment, the variation of the ¿-potential with pH was performed and the characteristics of the system are discussed. Weighing measurements were performed on-line. The variation of the measurements with increased electric field strength are shown. For both methods the reproducibility and the accuracy are discussed.
Original languageEnglish
Pages (from-to)95-104
JournalJournal of Chromatography, A
Volume470
Issue number1
DOIs
Publication statusPublished - 1989

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