Polarography with Alternating Currents. II. A.C. Polarography of Cadmium, Zinc, Lead, Thallium, Indium, Bismuth, and Antimony

Abstract

The A.C. polarographic waves of cadmium, zinc, lead, thallium, indium, bismuth, and antimony are discussed. A number of factors affecting the magnitude of the maximum differential current, iD~, e.g. the effect of series resistance in the cell circuit, amplitude of the A.C. voltage, variation in temperature, variation of supporting electrolyte, presence or absence of air, etc., have been determined. A solution containing a mixture of bismuth, antimony, lead, thallium, indium, cadmium, and zinc was analysed with A.C. polarography and it was found possible to distinguish each wave of the seven elements simultaneously present. This is not possible in conventional polarography.