Arsenic, Antimony, Selenium and Tellurium Determinations in High- purity Copper by Electrothermal Atomization.
At Absorpt Newsl 1979 18(2):46-49
As part of the Bureau of Mines program for advancing minerals technology, a high-current-density copper-electrowinning procedure is being tested. This paper describes a method developed in support of this research for the determination of arsenic, antimony, selenium, and tellurium in high-purity copper. After the samples of copper are dissolved in nitric acid, the solution is analyzed directly by electrothermal atomization methods. By determining these elements directly, most of the sample handling and preparation time is eliminated as compared with other techniques involving separation of the elements from the copper matrix. The analysis of National Bureau of Standards SRM 394 and SRM 395 reference materials and Canadian Spectroscopy Society copper standard ssc 1 provided good agreement with certified and recommended values for the four elements. The relative standard deviations obtained by this method were well within acceptable limits for determining the trace elements at or below the limits required for electrorefined copper. Sensitivities obtained by this method were 0.17 Ug/g for arsenic, 0.32 Ug/g for antimony, 0.34 Ug/g for selenium, and 0.27 Ug/g for tellurium.
At. Absorpt. Newsl., V. 18, No. 2, March-April 1979, PP. 46-49