Abstract
AbstractBenzoquinone (BQ) in solution catalyses the electrochemical oxidation of ascorbic acid (AH2) at basal plane graphite (BPG) electrode. The overpotential for AH2 decreases by 120 mV at pH 7.3 in presence of BQ as compared to the potential without BQ. A simultaneous increase in anodic current in the cyclic voltammogram of BQ as a function of AH2 forms the basis of a sensor for AH2. The kinetics for the reaction between AH2 and BQ have been determined by cyclic voltammetric data.
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