Behaviour and Quantification Studies of Iron(III)-dimethyldithiocarbamate Using Cyclic and Square-Wave Stripping Voltammetry

Abstract

The adsorptive and electrochemical behaviour of iron(III)-dimethyldithiocarbamate (ferbam) at mercury electrode were explored in Britton-Robinson buffer(B-R) solution by using cyclic and square wave voltammetry. Cyclic voltammetric studies indicated the reduction of iron(III)-dimethyldithiocarbamate at the electrode surface through a single three-electron and three-proton irreversible step and fundamentally controlled by adsorption. The solution conditions and instrumental parameters were optimized for the determination of the authentic food by square wave stripping voltammetry. Iron(III)-dimethyldithiocarbamate gave a sensitive adsorptive reduction peak at -680 mV (versus Ag/AgCl). The reduction peak was used to determine iron(III)-dimethyldithiocarbamate in range 1 to 15 ng mL^-1 with a detection limit of 0.6123 ng mL^-1. The procedure was successfully applied for the assay of iron(III)-dimethyldithiocarbamate in real samples.