Simultaneous Determination of Copper and Silver in Silver Concentrate by Atomic Absorption Spectrometry after Theorem Completion

Ming HUA

2013 Vol. 32, No. 2

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Ming HUA. Simultaneous Determination of Copper and Silver in Silver Concentrate by Atomic Absorption Spectrometry after Theorem Completion[J]. Rock and Mineral Analysis, 2013, 32(2): 235-239.

Citation:

Ming HUA. Simultaneous Determination of Copper and Silver in Silver Concentrate by Atomic Absorption Spectrometry after Theorem Completion[J]. Rock and Mineral Analysis, 2013, 32(2): 235-239.

Simultaneous Determination of Copper and Silver in Silver Concentrate by Atomic Absorption Spectrometry after Theorem Completion

Ming HUA^,

The First Geological Team of Geology and Mineral Resources Administration of Xinjiang, Shanshan 838204, China

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Corresponding author: Ming HUA, 772518674@qq.com

Received Date: 21 June 2012

Accepted Date: 27 August 2012

Abstract

Abstract

A method has been reported in articles for the simultaneous determination of copper and silver in geological samples or samples of mineral processing and smelting by Atomic Absorption Spectrometry in an aqua regia-thiourea medium. However, interference from copper made the determination of silver in the aqua regia-thiourea medium difficult. In this paper, a method is decribed whereby the sample was dissolved with a four-acid system of HCl-HF-HNO₃-HClO₄, extracted by aqua regia and chelated by theorem. The continuous determination of silver and copper in silver concentrate was made by Flame Atomic Absorption Spectrometry (FAAS) in an aqua-thiourea medium. The interference of coexisting elements was eliminated by testing different sample digestion methods and different concentrations of the thiourea medium. The results show that the samples were completely dissolved with the four-acid system. By adding excessive amounts of thiourea within the 20 g/L, the white precipitation of Ag was completely transformed into the Ag[SC(NH₂)₂]₃⁺ ion in order to eliminate interference from copper. This method was applied to the analysis of samples with relative standard deviations (RSD, n=6) for Cu and Ag in the range of 1.20%-2.11% and 0.61%-1.18%. With the standard addition, the recoveries for Cu and Ag were in the range of 96.5%-107.0% and 97.3%-104.7%. The determination results are in agreement with fire assay and iodometry results. The method has the merits of easy, practicality and low cost, which meet the demands for silver concentrate processing.
- silver concentrates /
- copper /
- silver /
- thiourea complexing /
- Flame Atomic Absorption Spectrometry

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References

[1]	YS/T 445.1～445.2-2001, 银精矿化学分析方法[S] Google Scholar
[2]	岩石矿物分析编写组．岩石矿物分析(第三版第一分册)[M]．北京:地质出版社, 1991: 836-866. Google Scholar
[3]	中国有色金属工业总公司鑫达金银开发中心, 中国有色金属工业总公司标准计量研究所.金银技术监督手册[M]．北京: 冶金工业出版社, 1997: 86-88 Google Scholar
[4]	陈怡,黄彦．以硫脲配位用原子吸收法测定矿石中银[J].贵州化工, 2007,32(3): 10-12. Google Scholar
[5]	薛光, 姚万林, 刘永生, 邱鸿喜, 刘涛.封闭溶样-硫脲介质原子吸收法测定矿石中的银[J].黄金, 2000,21(5): 46-47. Google Scholar
[6]	崔师泉.火焰原子吸收光谱法测定矿石中的银[J].新疆有色金属,2007(Z1): 83-84. Google Scholar
[7]	胡明,王荣华,关逸考.火焰原子吸收法测定岩石、土壤中微量银的研究[J].吉林地质,2007,26(1): 71-75. Google Scholar
[8]	李得强,王锐.封闭溶样硫脲介质原子吸收测定矿石中银的应用实践[J].青海国土经略,2007(3): 44-45. Google Scholar
[9]	陈立华.原子吸收法测定矿石中银的几种溶矿方法比较[J].有色矿冶, 2010,26(6): 51-53. Google Scholar
[10]	苏丹, 云作敏.火焰原子吸收法测定岩石样品中微量银方法的改进[J].黄金, 2010,31(10): 63-64. doi: 10.3969/j.issn.1001-1277.2010.10.015 CrossRef Google Scholar
[11]	高平, 徐清忠, 高东曙.银的分析[J].黄金, 2004,25(8): 44-45. Google Scholar
[12]	孙鹏, 王利平, 薛光.原子吸收法直接测定铅阳极泥中的金和银[J].黄金, 2011,22(4): 51-52. Google Scholar
[13]	路伟, 韩文红, 韩梅, 梁秀敏.高氯酸-硫脲介质AAS法测定高含量银的研究[J].河北地质, 2009(1): 30-32. Google Scholar
[14]	湖南省矿产测试利用研究所.岩石矿物分析[M].长沙: 湖南出版社, 1984: 228-229. Google Scholar
[15]	地质矿产部科学技术司实验管理处.岩石和矿物分析规程(第二分册)[M]．西安: 陕西科学技术出版社, 1994: 23-24. Google Scholar
[16]	吕凤侠, 王同聚, 杜冬梅.硫脲络合原子吸收光谱法同时测定银和铜[J].黄金, 1996,17(1): 48-50. Google Scholar
[17]	孙国荣.硫脲介质火焰原子吸收光谱法测定银的探讨[J].分析试验室, 1985,12(4): 13-15. Google Scholar
[18]	陈小燕.黑铜中银的分析方法研究[J].黄金, 2004,25(5): 47-48. Google Scholar
[19]	代素芳, 郑浩.在高氯酸-酒石酸-硫脲介质中原子吸收法测定多种矿石中的银[J].岩矿测试, 2000, 19(4): 301-303. Google Scholar
[20]	马重光.氨性介质原子吸收法测定银[J].岩矿测试, 1983,2(1): 136-138. Google Scholar
[21]	梁志伟, 王立新, 杨雪梅.在氨性介质中原子吸收法测定金精矿中的银和铜[J].黄金, 2004,25(4): 49-50. Google Scholar
[22]	牟长贤, 杨明荣.硫脲介质-火焰原子吸收法测定多金属矿中的银的研究[J].计量与测试技术, 2011,38(6): 29-31. Google Scholar
[23]	刘峰.原子吸收光谱分析银的背景吸收及基体干扰[J].光谱学与光谱分析, 1988,8(2): 71-72. Google Scholar
[24]	郑大中.湿法富集滴定法测金若干问题的探讨[J].地质实验室, 1991,7(3): 131-132. Google Scholar
[25]	蔡树型, 黄超.贵金属分析[M].北京: 冶金工业出版社, 1984: 21-22. Google Scholar