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Methods for on-line determination and control of electroendosmosis in capillary electrochromatography and electrophoresis

✍ Scribed by B.J. Wanders; A.A.A.M. van de Goor; F.M. Everaerts

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
270 KB
Volume
470
Category
Article
ISSN
1873-3778

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✦ Synopsis

Systems are described for the on-line determination and control of electroendosmosis that offer several advantages for both electrochromatographic and electrophoretic separations. For electrochromatographic separations the control system can be used to stabilize the electroendosmosis and obtain a better reproducibility of the results. For electrophoretic separations this control system offers the possibility of a so-called "upstream" separation, which results in a decrease in the plate height and thus a better resolution. Further, the controlable electroendosmosis can be used to determine with high reproducibility, in one run, both ionic (anions and cations) and non-ionic components, using only one detector.

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✍ A.A.A.M. van de Goor; B.J. Wanders; F.M. Everaerts πŸ“‚ Article πŸ“… 1989 πŸ› Elsevier Science 🌐 English βš– 596 KB

Two modified methods for measuring the i-potential and electroosmotic flow in capillaries for electrophoretic or electrochromatographic separations are discussed. Streaming potential measurements with computer control and data acquisition can be used off-line for rapid screening of the behaviour of