Simultaneous analysis of antimony bismuth and arsenic in copper concentrates by an atomic absorption method

摘要

We tried to establish a new method involving the simultaneous analysis of Sb, Bi and As in copper concentrates by an atomic absorption method. To examine the effect of coex- istent elements on the analysis, the main elements of Cu, Fe and/or S in the concentrates were added in the standard solutions. Sample pretreatment was very simple f the con- centrate samples were heated mildly with HNO_3, HCl and HBr to decompose, and the analysis was carried out for the obtained aqueous solutions after a filtration and cleaning process. Although the effect of coexistent elements of Cu, Fe and/or S was very large, their variations were minimized by adding LaCl_3 to the sample solutions. The results obtained by the new method were in a fairly good agreement with those obtained by the traditional JIS atomic absorption and ICP methods.