img

QQ群聊

img

官方微信

高级检索

J4 ›› 2012, Vol. 20 ›› Issue (3): 73-75.

• 技术前沿 • 上一篇    下一篇

氯金酸钠代替氯金酸测定矿石中金含量的研究

何巧玲,肖娟,汪永顺   

  1. 青海省有色地质矿产勘查院,青海  西宁   810007
  • 收稿日期:2012-02-29 修回日期:2012-04-06 出版日期:2012-06-28 发布日期:2012-11-12
  • 作者简介:何巧玲(1977-),女,四川汉源人,工程师,从事金及有色金属元素的化学分析工作.313176973@qq.com

The Gold Determination in Ores Using NaAuCl Instead of HAuCl by AAS

HE Qiaoling,XIAO Juan,WANG Yongshun   

  1. Geology and Mineral Exploration Institute Qinghai Provincial Bureau Geology and Mineral,Xi’ning   810007,Qinghai,China
  • Received:2012-02-29 Revised:2012-04-06 Online:2012-06-28 Published:2012-11-12

摘要:

矿石中金含量的测定通常采用王水溶解,使其形成氯金酸后再用原子吸收法或容量法进行测定,但是氯金酸溶液稳定性容易受温度、酸度、浓度、外界条件和容器吸附等因素的影响。为了提高氯金酸溶液的稳定性可用碱金属使其生成相对稳定的氯金盐,但未真正实践应用。本文提出了一种以氯金酸钠代替氯金酸做标准溶液测定矿石中金含量的方法,应用本方法配制的标准溶液放置3~4个月未出现还原偏低现象。该方法采用活性炭吸附柱富集金,用王水溶解,再加入饱和氯化钠溶液制得氯金酸钠溶液。采用原子吸收法,在日立Z-2000原子吸收分光光度计上测定金的含量。实验结果表明:该测定方法可靠,误差较小,稳定性好;测定的绝对灵敏度可达0.025 μg/g,测定范围为0.04~1 000 μg/g,适合用于大批量地质矿石样品中金的测定。

关键词: 活性炭吸附, 氯金酸钠, 原子吸收法,

Abstract:

The gold content in the ore is usually determinated by atomic absorption or volumetric method using the aqua regia dissolution method to generate gold chloride acid firstly,whose stability easily affected by temperature,acidity,concentration external conditions and container adsorption.In this paper,the method using gold chloride sodium instead of gold chloride acid for the determination of gold in ore content was developed.The standard solution prepared by the method was placed for three or four months still not turn to lower reduction.In this method,gold was enriched by activated carbon adsorption column,dissolved in aqua regia,and then gold chloride of sodium was prepared by adding the saturated sodium chloride solution.The determination of gold content was processed using the atomic absorption method in the Hitachi Z-2000 atomic absorption spectrophotometer.The experiments showed that the method is reliable,and owns small error and good stability.Depended on the absolute determination sensitivity of 0.025 μg/g and measuring range of 0.04~1 000 μg/g,this method was suitable for the gold determination in large quantities of geological ore samples.

Key words: Activated carbon adsorption, Auric sodium chloride, Atomic absorption, Gold

中图分类号: 

  • O657.31

[1] 曾雅成,何振书.岩石和矿石分析规程(第二分册)[M].西安:陕西科学技术出版社,1993.
[2] 薛光.金的分析化学[M].北京:宇航出版社,1999.
[3] 杨明荣,牟长贤.封闭溶样—泡塑富集火焰原子吸收法测定矿石中的金[J].黄金科学技术,2012,20(2):74-78.
[4] 艾晓军,聂凤莲,陈雪,等.Z-5000石墨炉原子吸收光谱法测定痕量金检出限的探讨[J].黄金科学技术,2011,19(4):65-67.
[5] 张永文,刘新会,王凯,等.原子荧光法测定微细浸染型金矿中化探样品的方法研究[J].黄金科学技术,2011,19 (3):79-82.
[6] 中国国家标准化管理委员会.金矿石化学分析方法(第1部分)[M].秦皇岛:中国标准出版社,GB/T20899.1-2.
[7] 长春工程学院.工业分析(1版)[M].吉林:吉林科学教育出版社,2005.
[8] 许大兴,向一毅,张桂葆,等.岩石和矿石分析规程[M].西安:陕西科学技术出版社,1994.

[1] 杨明荣,牟长贤. 封闭溶样—泡塑富集火焰原子吸收法测定矿石中的金[J]. J4, 2012, 20(2): 74-78.
[2] 逯克思. 石墨炉原子吸收光谱法测定化探样品中的金[J]. J4, 2009, 17(3): 68-70.
[3] 聂凤莲, 王丽华, 张蜀冀, 陈雪, 陈占生. 金标准溶液配制的不确定度评定[J]. J4, 2009, 17(3): 56-59.
[4] 陈占生, 李玄辉, 朝银银. 原子荧光光谱法快速测定化探样品中的砷、锑、铋、汞[J]. J4, 2009, 17(2): 51-53.
[5] 刘涛, 李念占, 李君强, 刘玖芬, 谢璐. Z-2000石墨炉原子吸收光谱法测定化探样品中的痕量金[J]. J4, 2009, 17(1): 53-55.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!