Abstract： After the sample was dissolved with aqua regia-hydrofluoric acid and selenium in the sample solution was thus volatilized and removed by sulfuric acid fuming at high temperature, a determination method of copper in hydrometallurgical mud, slag and other selenium-rich materials by iodometry was established. The experiment showed that, selenium could also react with iodine reagent to interfere with the determination of copper in glacial acetic acid medium. After treatment with aqua regia-hydrofluoric acid, the residual amount of selenium in the sample was higher than the maximum allowable amount of selenium for the determination of copper. However, after further treatment with sulfuric acid fuming, there was almost no residual selenium, so the interference of selenium with the determination of copper could be eliminated. The optimal dosage of sulfuric acid for volatilizing selenium was 3 mL. The removal mechanism of selenium was also discussed. The content of copper (2%-35%) in copper anode slime 1#, copper anode slime 2#, acid mud, iron replaced slag and selenium-rich material samples was determined by the proposed method. The results were consistent with those obtained by national standard method of GB/T3884.1-2000,and the relative standard deviations (RSDs, n=6) was less than 4 %.
梁云生，王劲榕. 硫酸冒烟-碘量法测定湿法冶金泥、渣等富硒物料中铜含量[J]. 冶金分析, 2012, 32(12): 38-41.
LIANG Yun-sheng,WANG Jin-rong. Determination of copper in hydrometallurgical mud, slag and other selenium-rich material by iodometry with sulfuric acid fuming. , 2012, 32(12): 38-41.
