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锡阳极泥中铟对铋含量测定的影响
蒯丽君
(北矿检测技术有限公司)
The influence of indium in tin anode slime on the determination of bismuth
KUAI Lijun
(Sub-Institute of Analytical Chemistry,Beijing General Research Institute of Mining and Metallurgy)
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投稿时间:2020-04-22    修订日期:2020-05-21
中文摘要: 采用传统Na2EDTA滴定方式测定锡阳极泥(当铟含量大于0.2mg时)试液会出现试液颜色无明显突跃和滴定终点难以判定的现象。本文主要探讨了Na2EDTA滴定法测定锡阳极泥试样中铋含量,当铟含量大于0.2mg时,对铋量测定有影响;讨论了铟在三种滴定条件下的络合行为;优化了铋的滴定条件;论证了在10.00mg、20.00mg、30.00mg、40.00mg铋标准溶液中加入不同含量的铟标准溶液,并在实际锡阳极泥样品YTXN-7中加入不同含量的铟,探讨了两种计算方法。实验表明,通过调节试液pH=1.5~1.7,采用Na2EDTA标准滴定溶液滴定至试液红色刚消失,加热试液至70℃~80℃,继续滴定,能够出现完成铋铟的络合滴定;当铟量在1.00mg~2.00mg时,方法2的实验数据更理想。
中文关键词: 锡阳极泥      Na2EDTA滴定法  换算因子
Abstract:Traditional Na2EDTA titration method is used to determine tin anode slime,when the content of indium is greater than 0.2mg,the test solution is difficult to determine the titration end point. This paper mainly discusses the determination of bismuth in tin anode slime by Na2EDTA titration. This paper mainly discusses, the bismuth content is affected, when the content of indium is more than 0.2mg; The complexation behavior of indium under three titration conditions is discussed; The titration conditions of bismuth were optimized, and it was demonstrated that different contents of indium standard solution were added into 10.00mg, 20.00mg, 30.00mg and 40.00mg bismuth standard solution. In addition, different contents of indium were added to the actual tin anode slime sample YTXN-7, and two calculation methods were discussed. Experiments show that, Experiments show that, titrate with Na2EDTA standard titration solution until the red color of the test solution just disappears, heat the test solution to 70℃- 80℃, by adjusting the pH value of the test solution to 1.5-1.7, and continue titrating, the complexometric titration of bismuth and indium can be completed; When the amount of indium is between 1.00mg and 2.00mg, the method 2th experimental data is better.
文章编号:20200422001     中图分类号:    文献标志码:
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引用文本:
蒯丽君.锡阳极泥中铟对铋含量测定的影响[J].中国无机分析化学,2020,(5):-.
KUAI Lijun.The influence of indium in tin anode slime on the determination of bismuth[J].Chinese Journal of Inorganic Analytical Chemistry,2020,(5):-.

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