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| Determination of Nickel in Copper Smelting Slag by Flame Atomic Absorption Spectrometry |
| Received:September 02, 2013 Revised:November 15, 2013 |
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| DOI：doi:10.3969/j.issn.2095-1035.2014.01.017 |
| KeyWord:flame atomic absorption spectrometry;copper smelting slag;nickel |
| Author | Institution |
| MA Lijun |
北方铜业股份有限公司 计量检验部，山西 垣曲 |
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| Abstract: |
| Through the study on chemical composition and properties of copper smelting slag, the experimental method for the determination of nickel was established. In copper smelting slag，silica content is about 20%~40% and the sulfur content is about 10% ~ 20%. Such high silica and sulfur contents bring some difficulties to the sample decomposition, which inevitably influence the determination of nickel. To overcome this problem, a certain amount of ammonium hydrogen fluoride and bromide are added to the sample during sample decomposition process. Due to the reaction between silica and ammonium hydrogen fluoride, which generates silicon tetrafluoride, and the reaction between sulfur and bromide, which generates hydrogen sulfide, the influence of silica and sulfur was eliminated. Afterwards, the rest of coexisting elements in the solution mainly are copper, silver, iron, and zinc etc., which do not interfere with the determination results. In 5% (V/V) nitric acid medium, the content of nickel was determined by flame atomic absorption spectrometry. The concentration ranges were from 0.01% to 1%. The recovery rates were 99.5%~100.4%. The relative standard deviations (n=7) were 0.61%~1.18% and the detection limit was 0.004 μg/mL. The method is rapid, simple, and can meet the need of daily production inspection. |
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