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Dispersive liquid-liquid microextraction and solid-phase extraction of polar pesticides from natural water and their determination by micellar electrokinetic chromatography

Research paper by V. G. Amelin, D. S. Bol’shakov, A. V. Tret’yakov

Indexed on: 21 Apr '13Published on: 21 Apr '13Published in: Journal of Analytical Chemistry



Abstract

Procedures for the determination of polar pesticides in surface and ground water after their preconcentration by dispersive liquid-liquid microextraction and solid-phase extraction on Oasis® HLB (3 cc/60 mg) extraction cartridges are proposed. Conditions for the separation and determination of pesticides from the following classes by micellar electrokinetic chromatography were chosen: arylhydroxycarboxylic acids, sym-triazines, triazinones, urea derivatives, neonicotinoids, carbamates, triazoles, imidazoles, benzimidazoles, and organophosphorus compounds. The determination limits of pesticides in water were 0.5–20 μg/L with consideration for preconcentration. The relative standard deviation of the results of analysis was no higher than 10%.