| EDTA滴定法测定钢渣中游离氧化镁 |
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| 引用本文： | 王博,刘家祥,罗珣,朱桂林,卢忠飞.EDTA滴定法测定钢渣中游离氧化镁[J].理化检验(化学分册),2011(8). |
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| 作者姓名： | 王博 刘家祥 罗珣 朱桂林 卢忠飞 |
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| 作者单位： | 北京化工大学材料科学与工程学院;中国京冶工程技术有限公司; |
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| 基金项目： | 中国京冶建筑研究总院合作项目 |
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| 摘 要： | 以碘-乙醇溶液为催化剂,选择乙二醇作溶剂浸取钢渣中游离氧化镁,采用EDTA滴定法测定其中游离氧化镁的含量。试验中考察了碘-乙醇的最佳用量和K-B混合指示剂的最合适配比。结果表明:催化剂碘-乙醇溶液的添加量达碘与氧化镁的质量比为7.5比1,指示剂中酸性铬蓝K和萘酚绿B的比值为1比1.4时,滴定终点变色明显,滴定结果准确。在钢渣中加入纯氧化镁测定的平均回收率为96.5%,相对标准偏差(n=5)为1.3%。
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| 关 键 词： | EDTA滴定法 钢渣 游离氧化镁 乙二醇 碘-乙醇溶液 |
EDTA Titrimetric Determination of Free Magnesium Oxide in Steel Slags |
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| WANG Bo,LIU Jia-xiang,LUO Xun,ZHU Gui-lin,LU Zhong-fei.EDTA Titrimetric Determination of Free Magnesium Oxide in Steel Slags[J].Physical Testing and Chemical Analysis Part B:Chemical Analgsis,2011(8). |
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| Authors: | WANG Bo LIU Jia-xiang LUO Xun ZHU Gui-lin LU Zhong-fei |
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| Institution: | WANG Bo~1,LIU Jia-xiang~(1*),LUO Xun~1,ZHU Gui-lin~2,LU Zhong-fei~2 (1.College of Material Science and Engineering,Beijing University of Chemical Engineering,Beijing 100029,China,2.China Jing-Ye Engineering Technology Co.,Ltd,Beijing 100088,China) |
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| Abstract: | Using ethanolic solution of iodine as catalyst,the free magnesium oxide(f-MgO) in steel slags was extracted with glycol as solvent and determined by EDTA titration.Optimum values of the amount of iodine-ethanol solution and the ratio of K-B indicator were studied.It was shown that the end point of titration was found to have an obvious color change when the ratio of acid chrome blue K to naphthol green B in the solution was 1:1.4 and the mass ratio of iodine to MgO was 7.5:1.Test for recovery was made by ad... |
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| Keywords: | EDTA titration Steel slags Free magnesium oxide Glycol Iodine-ethanol solution |
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