重铬酸钾滴定法测定甲基磺酸锡中Sn~(2+)和Sn~(4+)的含量 |
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引用本文: | 李峰,王泉.重铬酸钾滴定法测定甲基磺酸锡中Sn~(2+)和Sn~(4+)的含量[J].应用化工,2003,32(4):51-53. |
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作者姓名: | 李峰 王泉 |
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作者单位: | 1. 大连化工研究设计院,分析检测中心,辽宁,大连,116023 2. 上海东方天祥检验服务有限公司大连办事处,辽宁,大连,116001 |
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摘 要: | 研究了以重铬酸钾间接滴定甲基磺酸锡中Sn2+和Sn4+含量的方法。在6mol/L盐酸中用锌粉把Sn4+还原为Sn2+,加入硫酸铁铵快速氧化Sn2+,硫酸铁铵中的Fe3+被还原为Fe2+。用重铬酸钾滴定Fe2+来间接测定Sn2+和Sn4+含量。方法相对标准偏差为1.65‰,回收率99.98%。该方法简便,快速,结果准确可靠。
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关 键 词: | 甲基磺酸锡 锡 锌 重铬酸钾滴定法 |
文章编号: | 1671-3206(2003)04-0051-03 |
修稿时间: | 2003年1月1日 |
Determination of Sn2+ and Sn4+ in tin methane-sulfonate with dichromate method |
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Abstract: | A method for indirectly titrating the Sn2+and Sn4+ in tin methane sulfonate with dichromate method is studied. Sn4+ is reduced to Sn2+ with zinc powder in the 6 mol/L hydrochloric acid, Sn2+ is oxidated rapidly with ammonium ferric sulfate, the Fe3+ in ammonium ferric sulfate is reduced to Fe2+.The Sn2+and Sn4+are determined indirectly by means of titration of the Fe2+ with dichromate method. The relative standard deviation of the method is 1.65‰ and the recovery is 99.98%. The method is simple, rapid and accurate. |
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Keywords: | tin methane-sulfonate tin zinc dichromate method |
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