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SPE Preconcentration and TLC Determination of Pesticides in Aquatic Samples

Quantitative determination of pesticides: alachlor, atrazine and alpha-cypermethrin in aquatic samples is reported. Method involves solid-phase extraction (SPE) 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 regarding to the type of solvent and the volume of sample.

pesticides; water; solid-phase extraction (SPE); thin-layer chromatography (TLC); preconcentration

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