Abstract：The composition of copper anode slime is complex and the content of barium varies greatly. At present, there are no related detection standards. The analysis method of barium in copper anode slime by alkali fusion-inductively coupled plasma atomic emission spectrometry (ICP-AES) was proposed. The experimental conditions were listed as follows: 0.2g of sample was accurately weighed and fully mixed with 4g of sodium carbonate-potassium carbonate flux; 0.5mL of cesium chloride solution was added as the ionization buffer (15g/L); then the mixture was fused at (700±20)℃ for 30min; after cooling, leaching and filtration, the filtrate was discarded. The precipitate was dissolved and diluted to the mark. Ba 233.527nm was selected as the analytical line. The determination method of barium content in the copper anode slime by ICP-AES was established. The experimental results of element interference test showed that the tolerant amounts of following ions were listed as below for the determination of 10mg of barium when the relative error was controlled to less than ±1%: Pb(II) (400), Cu(II) (350), Sb(V) (50), Bi(III), Te(VI) (30) and Ni(II) (10). The mass concentration of barium in range of 0.50-25μg/mL had good linear relationship with the emission intensity. The linear correlation coefficients of calibration curves were 0.99999. The limit of detection was 6.0μg/g. The proposed method was applied for the determination of barium in actual sample of copper anode slime. The relative standard deviations (RSD, n=5) were less than 0.5%. The recoveries were between 94% and 102%.
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