碘量法测定铜矿石中铜方法的改进

李风; 席永婷

李风,席永婷.碘量法测定铜矿石中铜方法的改进[J].岩矿测试,2009,28(1):77-78

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Improvement on the Iodometric Method for Determination of Copper in Copper Ores

投稿时间：2008-02-29 修订日期：2008-03-20

DOI：

Key words: iodometry polyvinyl alcohol copper copper ore

作者	单位
李风	核工业新疆理化分析测试中心
席永婷	核工业新疆理化分析测试中心

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Abstract:

In order to reduce the error in copper analysis due to the volatilization of iodine and precipitation of CuI when the iodometric method is used for copper analysis, some improvements for the iodometric determination of Cu in copper ores are made through the experiments. The addition of polyvinyl alcohol improves solubility of CuI and prevents CuI from precipitation loss. And a stable complex of polyvinyl alcohol with I2 is formed, which prevents I2 from volatilization loss. Polyvinyl alcohol can also substitute starch as an indicator. The improved method provides the advantages of reliablity, simple operation and low cost.