STUDY OF THE REDUCTION OF PALLADIUM(II) ON A MERCURY-ELECTRODE IN THEPRESENCE OF DIMETHYLGLYOXIME

The adsorptive behavior of Pd-II ions in the presence of dimethylglyox ime (DMG) was investigated using voltammetric techniques. It was found that the bis-dimethylglyoximato palladium(II) complex is adsorbed str ongly between pH 3 and 5 and between the potentials 0 and -0.3V (vs. A g/AgCl). The peak current is proportional to the Pd-DMG surface concen tration, and increases linearly with scan rate (delta logi(p)/delta v = 0.97). The adsorptive stripping response was evaluated with respect to pH, the concentration of the electrolyte, the addition of surfactan ts and the preconcentration potential. From the results a general sche me for the reduction process is given.