Polarographic Determination of Stability Constants of Glycerato Complexes of Cadmium and Lead

Stability constants of glycerato complexes of cadmium and lead were determined by the polarographic method. Measurements were performed in buffer solutions of sod1um salt of DL-glyceDic acid. The concentration of the glyceric aoid in the buffer solutions was constant: 0.0 7 M for cadmium, and 0.05 NI for lead. The ionic strenght of solutions was 2 and -it was kept constant by m e ans of sodium perchlorate . The following cumulative stability constants were obta;ined: Cadmium: Bi = 40, B2 = 130, B3 = 340, B = 2.10. Lead: [3 1 = 340, B2 = 5.7 X 10 3, Ba = 2.8 X 10 3, B4 = 4.8 X 10 3