Electroanalysis with bismuth- and antimony-film plated carbon paste electrodes in complex-forming and mixed media

Abstract

In this paper, a new study is presented, concerning the possibilities and limitations of bismuth- and antimony-film plated carbon paste electrodes, BiF-CPE and SbFCPE, in combination with stripping voltammetry and mixed supporting electrolytes containing various complex-forming constituents. The experiments with both BiFCPE and SbF-CPE in solutions containing halides (F–, Cl–, Br–, I–), pseudohalides (SCN–, CNO–, CN–), EDTA, or organic anions (tartrate, citrate) were focused on electroanalytical performance of both electrodes for the determination of Cd2+ and Pb2+ as model ions. Their behaviour was observed and discussed via the effects of the individual media upon the peak characteristics, base-line, as well as the dissolution peak of Bi/Sb. The results obtained have confirmed numerous relations and typical features that can be utilised in practical measurements.