Abstract：Platinum and palladium in copper leaching residue were captured into gold-silver composite granule by lead fire assaying method. Then, the gold-silver composite granule was dissolved with nitric acid (1+7). After the solution was pouring out, the residues were dissolved with aqua regia(1+1). Merging the solutions above, the hydrochloric acid (1+1) was added to precipitate the silver. After filtration, the content of platinum and palladium in filtrate was determined. Thus, a method was established for determination of platinum and palladium in copper leaching residue by inductively coupled plasma atomic emission spectrometry (ICP-AES). The interference tests of gold and silver in gold-silver composite granule indicated that the absorption of platinum and palladium by silver chloride precipitate could be eliminated through continuous stirring in precipitation process. Meanwhile, gold in solution had no interference with the determination. The proposed method was applied to the determination of copper leaching residue actual samples. The relative standard deviations of the results (RSD, n=11) were 5.6%-9.7%, and the recoveries were between 94% and 104%. The content of platinum and palladium in control samples of copper leaching residue was determined by proposed method. The results were consistent with the reference values.
魏巍,柴徐彬. 铅试金-电感耦合等离子体原子发射光谱法测定铜浸出渣中铂钯[J]. 冶金分析, 2015, 35(6): 8-12.
WEI Wei,CHAI Xu-bin. Determination of platinum and palladium in copper leaching residue by inductively coupled plasma atomic emission spectrometry with lead fire assaying. , 2015, 35(6): 8-12.
