Voltammetric study of the hydrolysis product of Bendiocarb at the glassy carbon electrode

Differential pulse and square wave voltammetric methods are proposed for th e determination of the N-methylcarbamate insecticide Bendiocarb based on th e oxidation of its hydrolysis product. A single peak (+0.7 V (pH 3.5)) is o bserved at the glassy carbon electrode. Linear relationships between the pe ak intensity and the concentration were obtained up to 5 mug/ml, with detec tion limits of 0.77 mug/ml for DPV and 0.44 mug/ml for SWV, respectively. T he methods have been applied satisfactorily for the analysis of river water samples spiked with the pesticide by using the extraction with diethyl eth er as preconcentration step. Concentration values as low as 0.11 mug/ml wer e determined with a recovery of 96 +/- 3% (SWV) and 91 +/- 2% (DPV).