Electrolytic analysis of metals by the use of EDTA supporting electrolyte

Studies on controlled potential electroanalysis. VIII

Abstract

Deposition potentials of metals, such as gold, silver, mercury, copper, bismuth, lead, cadmium, and antimony, in various supporting electrolytes, such as ammonium nitrate-EDTA, ammonium acetate-EDTA, and ammonia-ammonium chloride-EDTA, have been measured, and the problem of quantitative deposition of these metals has been investigated. The results showed that the depositions of copper, cadmium, and silver, were quantitative, but the states of electrodeposition of the other metals were not so good.
Also, it was confirmed that electrolysis with the use of EDTA supporting electrolyte caused an inclusion of EDTA in the metal deposited on the cathode, and exhibited a tendency to give a plus error.