Z-2000石墨炉原子吸收光谱法测定化探样品中的痕量金

J4 ›› 2009, Vol. 17 ›› Issue (1): 53-55.

Z-2000石墨炉原子吸收光谱法测定化探样品中的痕量金

刘涛¹,李念占² ,李君强¹,刘玖芬¹ ,谢璐¹

1.武警黄金第七支队,山东烟台 264004;
2.烟台黄金设计院,山东烟台 264004

收稿日期:2008-08-21 修回日期:2008-10-11 出版日期:2009-02-28 发布日期:2014-01-26
作者简介:刘涛(1971-),女,高级工程师,从事地球化学样品中微量金、光谱多元素分析工作.

Determination of Trace Gold in Geochemical Sample by Z-2000 GFAAS

LIU Tao¹,LI Nianzhan²,LI Junqiang¹,LIU Jiufen¹,XIE Lu¹

1.No.7 Gold Geological Party of CAPF, Yantai 264004,Shandong,China;
2.The Gold Design Institute of Yantai, Yantai 264004,Shandong,China

Received:2008-08-21 Revised:2008-10-11 Online:2009-02-28 Published:2014-01-26

摘要/Abstract

摘要：

使用泡沫塑料富集金,经硫脲解脱,采用斜坡升温模式和热解涂层石墨管,经管壁原子化,分析测定化探样品中的痕量金,讨论不同曲线对测定结果的影响。通过标准回收实验和不同分析方法结果对照及对国家一级标准物质的分析测定,表明该方法具有良好的准确度和精密度,方法检出限为0.1×10^-9,方法回收率在97%～106%之间,精密度(RSD,n=12)为3%～11% ,满足1∶5万化探样品中痕量金的分析要求。

关键词: Z-2000石墨炉, 原子吸收光谱法, 痕量金, 泡沫塑料, 化探样品

Abstract:

Trace gold is concentrated with foam plastics, by extrication of sulfur thiourea solution, using the technology of slope-heating and pyrolytic coated graphite tube formeasure trace gold by Z-2000 graphite furnace atomic absorption spectrometry(GFAAS),we discuss the influences of standard curve and working curve on the determination result.By standard recovery experiment,variousmethods compare and determination of the first class national standard materials,the detection limit of the method is 0.1×10^-9,the recovery rate is 96%～110% and the p recision is 3%～11%,which satisfy analysis requirements of trace gold in 1∶50 000 geochemical sample.

Key words: Z-2000 graphite furnace, Atomic absorption spectrometry, Trace gold, Foam plastics, Geochemical samples

中图分类号:

O657.31

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.

LIU Chao-1, LI Nian-Tie-2, LI Jun-Jiang-1, LIU Jiu-Fen-1, XIE Lu-1. Determination of Trace Gold in Geochemical Sample by Z-2000 GFAAS[J]. J4, 2009, 17(1): 53-55.

参考文献

[1] 邓勃,何华焜.原子吸收光谱分析[M].北京:化学工业出版社,2004.
[2] 薛光.泡沫塑料富集金[M].北京:北京大学出版社,1990.
[3] 薛光.无污染封闭水浴溶样快速测定化探样品中的痕量金[J].黄金科学技术,1993,1(1):58-60.
[4] 陈东志,李进军.泡沫塑料富集原子吸收法测定金的若干技术问题[J].黄金科学技术,2005,13(1):88-90.

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