Optimizing separation conditions for chlorophenoxycarboxylic acid herbicides in natural and potable water using capillary zone electrophoresis

摘要: Chlorophenoxycarboxylic acid herbicides were separated and determined by capillary electrophoresis. An analysis of a six-component mixture containing 2,4-dichlorophenoxybutyric (2,4-DB), 2,4-dichlorophenoxypropionic (2,4-DP), 2,4,5-trichlorophenoxyacetic (2,4,5-T), 2,4-dichlorophenoxyacetic (2,4-D), phenoxyacetic (PA) acids 2,4-dichlorophenol (2,4-DCP), the product their degradation in aqueous media, took no longer than 15 min. Solid-phase extraction on Diapak C-16 cartridges was used for sample preparation. The detection limits water samples with account preconcentration (K = 250) found to be 0.0005 mg/L 2,4-DB, 2,4-DP, 2,4,5-T, 2,4-D 0.001 PA. It shown that humic (< 50 mg/L) do not interfere determination chlorophenoxycarboxylic acids.