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氢化物-原子荧光光谱法测定地质样中的痕量硒--不同溶样方式的比较
Determination of Trace Selenium in Geological Samples by Hydride Generation Atomic Fluorescence Spectrometry--A Comparative Experiment of Two Different Dissolution Methods

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文摘 以确定测试基性岩中痕量硒的最佳溶样方式为目的,分别采用加压(PTFE)强酸消解和常压强酸消解两种方法消解标准参考物质和地质样品,直接用氢化物-原子荧光光谱法(HG-AFS)测定.实验选用标准参考物质GWB07105、GWB07107对方法准确度和精确度进行验证,所测得总硒量与推荐值相符,标准偏差(SD)小于7.3 ng/g,相对标准偏差(RSD)小于8.9%.实验测定了5个硒含量不同的岩石样品,不同方法所测数据基本一致.样品的均匀性在一定程度上影响痕量硒的测定结果.综合评价比较二者的测定结果,可知加压(PTFE)强酸消解(硝酸+硫酸+氢氟酸)为最佳溶样方式.
其他语种文摘 A comparative experimenl of two different dissolution methods was carried out for the purpose of selec-ting the most effective method for dissolving basic rock samples. The referencing standard materials and rock sam-ples were dissolved by strong acid under atmospheric pressure and under the pressure higher than the atmospheric one respectively, in order lo prepare solutions for determining trace selenium by hydride generation aiomic fluores-cence spect romelry (IIG AFS). The referencing standard materials (GWBO71O5, GWB071()7 ) were applied for verifying the analytical accuracy and precision. The analytical results of their total selenium contents are in accord-ance with ihe referencing values with the standard deviation(SD)of less than 7.3 ng/g and relative standard devia-tion (RSD) of 8. 9 % ( ;/ = 3) respectively. Then five geological samples were dissolved by the above two methods respectively to prepare solutions for analyzing their total selenium contents with the analytical contents varying from 74. 5 ng/g lo 277. 6 ng/g. The analytical results of solutions prepared hy different methods using same samples are very similar. The analytical values could be affected in some extent hy the homogenization degrees of samples. In general, the most effective way of dissolving samples is believed to be the strong acid (I IN():iT II.SO, -|- HF) dis-solution under the applied pressure.
来源 矿物岩石地球化学通报 ,2005,24(3):200-203 【扩展库】
关键词 氢化物发生原子荧光光谱法 ; 强酸消解 ; 地质样品 ; 痕量硒
地址

中国科学院, 中科院矿床地球化学开放实验室, 贵阳, 550002

语种 中文
文献类型 研究性论文
ISSN 1007-2802
学科 地质学
基金 中国科学院知识创新工程项目 ;  国家自然科学基金资助项目
文献收藏号 CSCD:2020537

参考文献 共 10 共1页

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8.  杨翼华. 流动注射-原子荧光法测定岩矿中痕量硒和碲[J]. 岩矿测试,1996,1(1):61-64 被引 9    
9.  Ian D Brindle. Investigations into mild conditions for reduction of Se(VI) to Se(IV) and for hydride generation in determination of selenium by direct current plasma atomic emission spectrometry[J]. Spect. Acta Part B,1997,52:163-176 被引 2    
10.  任萍. 焙烧富集分离-氢化物原子荧光法测定地质物料中痕量硒[J]. 分析试验室,1994,13(4):65-67 被引 6    
引证文献 10

1 汤志勇 岩石矿物分析 分析试验室,2006,25(9):112-122
被引 5

2 汪志国 土壤及河流沉积物中Hg、As、Sb的同时测定 矿物岩石地球化学通报,2007,26(2):141-143
被引 2

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