DIN EN 16117-2:2013-02

This European Standard specifies an electrolytic method for the determination of the copper content of unalloyed copper materials with a copper content higher than 99,80 % (mass fraction) in the form of castings, wrought and unwrought products. Silver, if present, is co-deposited and is reported as copper. Approximately one-half of any selenium and tellurium present will co-deposit. Bismuth, if present, also interferes. Principle: test portion is dissolved in a nitric and sulphuric acid mixture. The copper is subsequently electrodeposited on a platinum cathode of known weight. A weighing of the cathode together with the electrodeposited copper takes place consequently. The residual copper in the spent electrolyte is determined by means of atomic absorption spectrometry. This European Standard has been prepared by CEN/TC 133 "Copper and copper alloys" (secretariat: DIN, Germany) of the European Committee for Standardization (CEN). The national interests during the preparation of this standard were represented for this purpose by Working Committee NA 066-02-06 AA "Analysenverfahren für NE-Metalle" ("Methods of analysis for non-ferrous metals") of the Nonferrous Metals Standards Committee (FNNE) of DIN, the German Institute for Standardization e. V.