CAPILLARY-ZONE-ELECTROPHORESIS WITH INDIRECT UV DETECTION OF HALOACETIC ACIDS IN WATER

A capillary zone electrophoresis (CZE) system for determining haloacet ic acids in water was optimized with indirect photometric detection. T wo different carrier electrolytes, potassium hydrogenphthalate and sod ium 2,6-naphthalenedicarboxylate, were evaluated in terms of sensitivi ty and two different electroosmotic flow modifiers, tetradecyltrimethy lammonium bromide and hexadecyltrimethylammonium bromide, were tested. Parameters such as electrolyte concentration and pH, and the concentr ation of the electroosmotic flow modifiers, which affect the CZE separ ations, were investigated. The method was used to determine haloacetic acids in chlorine tap water using the liquid-liquid extraction proces s. (C) 1998 Elsevier Science B.V. All rights reserved.