The pre-concentration procedure by oxidation of K-pyrrolidine-1-carbodithoinat was successfully applied for the spectrophotometric determination of trace amounts of Cu [14]. The authors discuss producing thiuram disulphide in the solution by oxidising of the reagent mentioned by adding iodine.
In the present study Na-DTC is used both as a complex forming agent and as a collector. This is the main advantage of the proposed approach. The co-precipitation runs according to the following scheme: