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Alternating Current Anodic Stripping Voltammetric Method For Trace Determination Of Thallium

Ravin Jugade, Christine Jeyaseelan, Arun P.Joshi

An alternating current anodic stripping voltammetric (ACASV) method has been developed for trace determination of thallium (I). The base electrolyte used is 0.05 mol L-1 EDTA at which a well-defined peak is observed with Ep at -0.39 V. Parameters like concentration of maxima suppressor, pre-electrolysis time, pre-electrolysis potential, electrode dimensions, etc have been optimized. Under optimum conditions, the detection limit was found to be 0.1 μg L-1 for Tl(I). The method is highly selective and sensitive and has been applied to the determination of thallium in spiked water, leaves, grapes and wine samples.