W. Reichel, Brian G. Bleakley
1974
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0
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54
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Journal
Analytical Chemistry
Abstract
A simple coprecipitation technique for the quantitative separation and concentration of trace impurities in anode and blister copper is described. Lanthanum hydroxide is employed as the collector. Trace quantities of selenium, teilurium, arsenic, autimony, iron, lead, tin, and bismuth are separated from the copper matrix and subsequently determined by atomic absorption spectrophotometry from a single sample solution. Minor interferences caused by impurities and small amounts of coprecipitated copper are overcome by inclusion of calculated amounts of copper into multi-element standards. Quantitative recoveries with relative standard deviations under 3% have been obtained. The procedure effects considerable saving in time compared to traditional methods and is at least of comparable accuracy. A study of the behavior of lanthanum hydroxide on the precipitation of selenium is presented. (auth)