Determination of Herbicides of the Chlorophenoxycarboxylic Acid Type in Natural and Drinking Water by Capillary Zone Electrophoresis

The method of capillary electrophoresis was applied to separate and quantitatively determine herbicides belonging to the class of chlorophenoxycarboxylic acids: 2,4-dichlorophenoxyoleic, 2,4-dichlorophenoxypropionic, 2,4,5-trichlorophenoxyacetic, 2,4-dichlorophenoxyacetic, and phenoxyacetic, and the final product of their decomposition in an aqueous medium of 2,4-dichlorophenol. The influence exerted by - and - cyclodextrin on the selectivity of the separation system under study was analyzed. The hindering effect of humic acids on the separation and determination of phenoxycarboxylic acids by capillary electrophoresis was assessed.