Amperometric determination of copper, cadmium and nickel and their binary mixtures with methyldithiobiuret

Abstract

Copper, cadmium and nickel have been estimated amperometrically in ammoniacal ammonium tartrate and potassium nitrate (pH ∼ 8.0-9.5) using methyldithiobiuret as the titrant. The advantage of the oxidation potential of the reagent have been put to a practical use in these determinations. Furthermore, by the combined use of the cathodic current of a reducible ion (Cu2+) and the anodic current of the reagent simultaneous determination of the two components of binary mixtures (e.g., copper-cadmium and copper-nickel) in a single operation has also been achieved. The process is rapid and yields reproducible results within the limits of experimental errors. © 1969 Springer-Verlag.