| 镀锌废酸中铁、锌含量的测定方法 |
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| 引用本文： | 叶素妹.镀锌废酸中铁、锌含量的测定方法[J].化学分析计量,2009,18(1). |
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| 作者姓名： | 叶素妹 |
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| 作者单位： | 上海轻工业研究所有限公司分析测试中心,上海,200031 |
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| 基金项目： | 上海市科委应用技术开发专项资金项目 |
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| 摘 要： | 镀锌废酸液具有高铁、高酸、低锌的特性.镀锌废酸液中铁约是锌的10倍,主要以Fe2+形式存在,用H2O2将Fe2+转化为Fe3+,转换率达到100%,且反应体系中不产生新的测定干扰元素.采用氟化钠掩蔽镀锌废酸液中高浓度的Fe3+,解决了Fe3+对EDTA络合滴定测锌的强烈干扰,方法的回收率达到97%以上.用H2O2将镀锌废酸液中高含量的Fe2+全部转换为Fe3+.用碘量法分别测定总铁、Fe3+,其回收率分别为99%、98%以上,通过计算得到Fe2+在镀锌废酸液中的含量.
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| 关 键 词： | 铁 锌 络会滴定 碘量法氩化还原 |
DETERMINATION OF IRON AND ZINC IN ZINCIFICATION WASTE ACID |
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| Ye Sumei.DETERMINATION OF IRON AND ZINC IN ZINCIFICATION WASTE ACID[J].Chemical Analysis And Meterage,2009,18(1). |
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| Authors: | Ye Sumei |
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| Institution: | Shanghai Light Industry Research Institute Co.Ltd.;Shanghai 200031;China |
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| Abstract: | In zincification waste acid,concentration of iron was high and concentration of zinc was low.The concentration of iron existing in the form of Fe2+ was ten times higher than zinc in zincification waste acid.H2O2 was used to change Fe2+ into Fe3+and the conversion rate was 100% without interference.Fe3+was masked by sodium fluoride solving the interference of Fe3+ to determination of zinc with recovery more than 97%.Fe2+changed into Fe3+by using H2O2,then total iron and Fe3+were determined by using iodimety.... |
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| Keywords: | iron zinc compleximetry iodimetry |
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