Electrocatalytic detection of ascorbic acid using N,N,N’,N’-tetramethyl-para-phenylene-diamine (TMPD) mediated oxidation at unmodified gold electrodes; reaction mechanism and analytical application

The redox mediator N,N,N’,N’-tetramethyl-para-phenylene-diamine (TMPD) is shown to catalyse oxidation of ascorbic acid (AA), which is otherwise known to exhibit irreversible electrode kinetics and produce deposits on the electrode surface. The mechanism of the catalysed reaction is reported and infe...