Sobre a dosagem fotométrica do Cobre em águas / About a photometric dosage of copper in water

The auhor presents an analytic process for copper quantitative determiantion in mineral and potable waters, based in the reaction of the cation copper with sodium diethyl-dithio carbamate. Due to the presence of certain elements common in water, such as iron, calcium, magnesium, etc., the main principles of the reaction behabior were studied. In the same manner the reaction sensibility was verified as well as its precision, by the addition of known quantities of copper. About the end of the work presented, there are shown some copper determination made through the mentioned process with mineral and potable waters of Parana