| 碲铋渣中铋的测定 |
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| 引用本文： | 谢辉,赖心,黄葡英,李沁. 碲铋渣中铋的测定[J]. 中国无机分析化学, 2013, 3(1): 65-67 |
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| 作者姓名： | 谢辉 赖心 黄葡英 李沁 |
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| 作者单位： | 广州有色金属研究院分析测试中心 广州 510650,广州有色金属研究院分析测试中心 广州 510650,广州有色金属研究院分析测试中心 广州 510650,广州有色金属研究院分析测试中心 广州 510650 |
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| 摘 要： | 讨论了在pH=9.4～10.0的氨性溶液中,利用Fe3+与Te4+、Bi3+生成三元共沉淀物,分离其它杂质,然后用KOH溶解Te,从而达到Te,Bi分离的目的。在pH=1.5～1.7的溶液中,利用抗坏血酸掩蔽铁,以硫脲-PAR作为指示剂,用EDTA标准溶液滴定Bi。当n=6时,相对标准偏差为0.4%,回收率为98.53%～102.2%,方法准确、可靠。
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| 关 键 词： | 铁 碲 铋 共沉淀分离 容量法 |
| 收稿时间： | 2012-06-20 |
| 修稿时间： | 2012-11-20 |
Determination of Bismuth in Bi-Te Slag |
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| XIE Hui,LAI Xin,HUANG Puying and LI Qin. Determination of Bismuth in Bi-Te Slag[J]. Chinese Journal of Inorganic Analytical Chemistry, 2013, 3(1): 65-67 |
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| Authors: | XIE Hui LAI Xin HUANG Puying LI Qin |
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| Affiliation: | Analytical Testing Research Center under Guangzhou Research Institude of Non-Ferrous Metals Guangzhou,Analytical Testing Research Center under Guangzhou Research Institude of Non-Ferrous Metals Guangzhou,Analytical Testing Research Center under Guangzhou Research Institude of Non-Ferrous Metals Guangzhou,Analytical Testing Research Center under Guangzhou Research Institude of Non-Ferrous Metals Guangzhou |
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| Abstract: | Fe3+,Te4+ and Bi3+ can form a ternary complex precipitate in ammonia containing solution at pH=9.4~10, so by the precipitation reaction, other impurity elements in Bi-Te slag can be separated from the slag sample. Then the ternary complex was dissolved using KOH and Te4+ was released into the solution, whereas Bi was not. By this means, Te and Bi was separated. At pH=1.5~1.7, using ascorbic acid to mask iron ion and thiourea-PAR as indicator, Bi3+ was titrated by EDTA standard solutions. The standard deviation is 0.071(n=6) and the standard addition recoveries are 98.5%~102.2%. The method is accurate and reliable. |
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| Keywords: | ferric tellurium bismuth separation by coprecipitation volumetric method |
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