| EDTA络合滴定法测定赤泥盐酸浸出液中的铝 |
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| 引用本文： | 张林香.EDTA络合滴定法测定赤泥盐酸浸出液中的铝[J].山西化工,2012,32(1):32-34. |
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| 作者姓名： | 张林香 |
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| 作者单位： | 太原理工大学化学化工学院,山西太原,030024 |
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| 摘 要： | 考察了EDTA络合滴定法中各影响因素。结果表明，加入1＋1乳酸2mL即可掩蔽溶液中的Ti4＋离子；EDTA的加入量以相对于铝过50％为宜；选用二甲酚橙作指示剂，通过控制溶液pH值可使滴定终点敏锐而准确；加热煮沸2rain～2．5min可使络合反应完全。采用本法测定盐酸浸出液中的铝，RSD（n=6）仅为0．625％-1．266％，加标回收率100．1％～102．3％，测定结果比较稳定。
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| 关 键 词： | 铝 赤泥 浸出液 乙二胺四乙酸二钠 络合滴定 |
Determination of aluminum in hydrochloric acid leaching solution of red mud by EDTA complexometric titration |
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| ZHANG Lin-xiang.Determination of aluminum in hydrochloric acid leaching solution of red mud by EDTA complexometric titration[J].Shanxi Chemical Industry,2012,32(1):32-34. |
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| Authors: | ZHANG Lin-xiang |
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| Affiliation: | ZHANG Lin-xiang(College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024,China) |
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| Abstract: | It was needed to accurate determination of aluminum content for compehensive utilization of red mud.In the paper,the influence factors of EDTA complexometric titration of aluminum in hydrochloric acid leaching solution of red mud were investigated.The results showed that Ti4+ ion could be covered sufficiently by adding 2 mL of 1+1 lactic acid.When addition of EDTA was over 50% and xylenol orange was used as an indicator,a sharp and accurate titration results could be got by adjusting the pH value of solution.And boiling 2 min~2.5 min was enough to complete the complexation reaction.On the base of 0.625%~1.266% RSD(n=6) and 100.1%~102.3% recovery rate,the method of EDTA complexometric titration was accepted. |
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| Keywords: | aluminum red mud leaching solution EDTA complexometric titration |
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