Behavior of different metal/ligand systems in adsorptive cathodic stripping voltammetry

The behavior of a series of metal/ligand systems in adsorptive cathodic str ipping voltammetry was investigated. Attention was focused on two groups of ligands, namely seven naphthalene-hydroxy-azo sulfonic species and four qu inolines. The behavior of the free ligands and of their complexes with four metal ions, namely Cd(II), Mn(II), Ni(II) and Pb(II), was studied at diffe rent pH values. The results are discussed with reference to ligand structur es and complex stabilities. The main use of these data is to choose, or dis card, a ligand in an analytical application, to predict the behavior of spe cies with similar structures or to get information for other electrochemica l techniques.