Amperometric determination of copper with resacetophenone-phenylhydrazone

An amperometric method for determination of copper (II) with resacetophenone-phenylhydrazone is described. The method is useful to determine the metal in amounts ranging from 1·0–16·0 mg with an accuracy of ±1 per cent. Ten-fold excess of zinc, cadmium and nickel did not interfere. Iron which interefered both polarographically and chemically was complexed with sodium fluoride and the determination was successfully carried out. The method was applied for the determination of the metal in german silver.