Carbon paste electrodes for electroanalysis in nonaqueous media

Abstract

The aim of this special study was to find out the relationship between the composition of carbon pastes and their stability in purely organic solvents and aqueous-organic mixtures. Scanning electron microscopy and cyclic voltammetry of 1 mmol L−1 ferrocenium/ferrocene redox couple served as the tools of choice for this purpose. The results obtained suggest one that it is not possible to prepare a universal carbon paste electrode that would be applicable in voltammetric measurements independently of the character and composition of the working medium.