| 碘量滴定法测定过氧化氢溶液浓度的改进 |
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| 引用本文： | 潘勇军,谢洪泉,谭晓明,刘丽,郑成赋.碘量滴定法测定过氧化氢溶液浓度的改进[J].理化检验(化学分册),2003,39(7):404-405. |
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| 作者姓名： | 潘勇军 谢洪泉 谭晓明 刘丽 郑成赋 |
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| 作者单位： | 1. 武汉科技学院环境与化学工程系,武汉,430073
2. 华中科技大学 |
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| 摘 要： | 研究了用碘量滴定法测定过氧化氢浓度时，试剂的加入顺序和放置时间对测定结果的影响。结果表明，在用碘量滴定法测定过氧化氢浓度的过程中，酸化条件下，I^-与H2O2反应的最佳时间为5～10min。与高锰酸钾氧化法相比，碘量法测定效果较好一些。
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| 关 键 词： | 碘量滴定法 测定 过氧化氢溶液 浓度 高锰酸钾 |
| 文章编号： | 1001-4020(2003)07-0404-02 |
| 修稿时间： | 2001年11月25 |
MODIFICATION OF THE IODOMETRIC DETERMINATION OF CONCENTRATION OF HYDROGEN PEROXIDE SOLUTION |
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| PAN Yong-jun,XIE Hong-quan,TAN Xiao-ming,LIU Li,ZHENG Cheng-fu.MODIFICATION OF THE IODOMETRIC DETERMINATION OF CONCENTRATION OF HYDROGEN PEROXIDE SOLUTION[J].Physical Testing and Chemical Analysis Part B:Chemical Analgsis,2003,39(7):404-405. |
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| Authors: | PAN Yong-jun XIE Hong-quan TAN Xiao-ming LIU Li ZHENG Cheng-fu |
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| Abstract: | The optimum condition for the iodometric determination of concentration of hydrogen peroxide solutions was critically studied and it was found that the sample solution should be acidified with dilute sulfuric acid before the addition of potassium iodide, and that the solution should to stay for 5 to 10min, but not longer than 10min, before the titration with Na_2S_2O_3 titrating solution. Under this condition, hydrogen peroxide reacts completely with iodide to liberate I_2, without any side reactions. The results obtained by iodometric titration were in consistency with the results obtained by the standard method of KMnO_4 titration. But the iodometric method has the advantage of elimination from the interferences of some stabilizing agents which are commonly added to the hydrogen peroxide solution. |
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| Keywords: | Iodometry Hydrogen peroxide Optimum condition |
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