Abstract
A recently proposed polarographic method (J. Electroanal. Chem., 194 (1985) 11) for the determination of the stability constants of metal complexes, based on the shifts undergone by the anodic waves/peaks of mercury oxidation in the presence of a ligand when an excess of metal ion is added, is critically tested. The application of the method to the β 1 determination of several well-known systems is described. The systems employed were Cd(II)-thiourea, Ni(II)-thiocyanate, Cu(II)- and Ni(II)-ethane-1, 2-bismercaptoacetic acid. The β 1 value of the Cd(II)-phenylthiourea system, which has not been reported previously in the literature, was also determined. The advantages and limitations of the method are discussed.
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