SYSTEM PEAKS IN CAPILLARY ZONE ELECTROPHORESIS .1. SIMPLE-MODEL OF VACANCY ELECTROPHORESIS

The paper introduces the concept of vacancy electrophoresis where inst ead of normal electrophoretic zones, system peaks (concentration vacan cies) migrate and are separated. The electrolyte set-up to achieve thi s requires a reversal of background electrolyte and sample with the ca pillary filled by the sample and the background electrolyte injected i nstead. A simple theory of electromigrational zone dispersion is used to describe the origin and properties of a system peak corresponding t o a concentration vacancy. Model experiments confirm the theoretical c onsiderations. The potential practical use of vacancy electrophoresis is discussed.