Use of vitreous carbon as a working electrode for a coulometric redox titration

Abstract

Vitreous or glassy carbon has been examined as to its suitability for use as a working electrode in the coulometric generation of bromine. It has been found to compare well with platinum for this purpose, although an appreciable increase in the electrode potential is required to maintain a given current density. The theoretical current efficiency for the generation of bromine has been found to be better than 99·9 per cent. The theoretical value has been confirmed by the titration of 100 µequiv of arsenic(III) with an accuracy and precision each of 0·1 µequiv.