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SPE preconcentration and TLC determination of alachlor, atrazine and α-cypermethrin in water samples

Quantitative determination of the pesticides alachlor, atrazine and alpha-cypermethrin in aquatic samples is reported. The method involves solid-phase extraction (SPE) for preconcentration of pesticides, separation of samples by means of thin-layer chromatography (TLC), and quantification by video densitometry. Computer-assisted optimization was used to select the optimum mobile phase composition. The extraction procedure was optimized with regard to the type of elution solvent and the volume of sample.

Pesticides ; Alachlor ; Atrazine ; alpha-cypermethrin ; Water ; Solid-phase extraction (SPE) ; Thin-layer chromatography (TLC) ; Preconcentration

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