Polarography of Cerium-N, N-Dihydroxyethylglycine Complexes

Department of Chemistry, University of Jodhpur, Jodhpur. Polarographic behaviour of Ce(IV) and Ce(III) has been studied in alkaline N, N-dihydroxyethylglycine. The complexes formed with both the oxidation states of cerium are quite stable even at high pH. The complex species formed with both Ce(IV) and Ce(III) are the same and no change in half-wave potentials is noted on chang­ing the ligand concentration. The half-wave potential is very much pH dependent and the studies have been made at 0.2M to 1.0M hydroxyl ion concentrations. The waves, both cathodic and anodic, are fully reversible and are diffusion controlled. Three electrode reactions have been proposed depending upon the hydroxyl ion concentra­tions