| 改进氨水-碘量法测定高银铜精矿中铜的含量 |
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| 引用本文： | 李敏.改进氨水-碘量法测定高银铜精矿中铜的含量[J].地质与资源,2013,22(4):330-332. |
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| 作者姓名： | 李敏 |
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| 作者单位： | 北京矿冶研究总院, 北京 100076 |
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| 摘 要： | 在对广西河池地区高银铜精矿中铜含量的测定中,由于样品中银含量较高,极大地影响终点判定,常用国标碘量法无法准确对铜含量进行定量.用氨水-碘量法将样品利用盐酸-硝酸-溴体系处理,样品充分溶解后,用盐酸去除高含量银残留的影响,用氨水-乙酸法调节溶液pH值,用硫代硫酸钠标准溶液滴定测定样品中铜的含量,结果满意.
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| 关 键 词： | 氨水-碘量法 高银铜精矿 铜含量 盐酸-硝酸-溴体系 |
| 收稿时间： | 2012-10-31 |
DETERMINATION OF CONCENTRATION OF COPPER IN A HIGH SILVER-BEARING COPPER CONCENTRATE BY IMPROVED AMMONIA-IODOMETRY |
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| LI Min.DETERMINATION OF CONCENTRATION OF COPPER IN A HIGH SILVER-BEARING COPPER CONCENTRATE BY IMPROVED AMMONIA-IODOMETRY[J].Geology and Resources,2013,22(4):330-332. |
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| Authors: | LI Min |
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| Affiliation: | Beijing General Research Institute of Mining and Metallurgy, Beijing 100076, China |
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| Abstract: | An improved ammonia-iodometry is developed to determine the concentration of copper in a high silver-bearing copper concentrate in Hechi, Guangxi Region. Samples are dissolved by hydrochloric acid-nitric acid-bromine system, and then an appropriate amount of hydrochloric acid is added to eliminate the residual contamination of high content of silver. The pH value of the solution is regulated by ammonia-acetic acid. The concentration of copper is finally determined by titration with standard solution of sodium thiosulfate. Satisfactory results are obtained. |
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| Keywords: | improved ammonia-iodometry high silver-bearing copper concentrate copper concentration hydrochloric acid-nitric acid-bromine system |
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