Potentiometric stripping analysis with a thin-film gold electrode for determination of copper, bismuth, antimony, and lead

Abstract

The in situ thin-film gold electrode at glassy carbon substrate has been successfully used as a working electrode in potentiometric stripping analysis. Gold(III) present in the solution studied also serves as an oxidant. The equations for the transition time (stripping signal) and for the stripping curve of potentiometric stripping analysis have been derived and verified experimentally for copper(II), bismuth(III), antimony(III), and lead(II), in 0.1 M HCl. This method is available for the simultaneous determination of these four ions used for sample analysis.