Determination of Selenium in Fifty Two Geochemical Reference Materials by Hydride Generation Atomic Absorption Spectrometry

Determination of Selenium in Fifty Two Geochemical Reference Materials by Hydride Generation Atomic Absorption Spectrometry
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氢化物发生原子吸收光谱法测定52种地球化学标准物质中的硒

DOI:
10.1111/j.1751-908x.2000.tb00589.x
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发表时间:
2000
影响因子:
3.8
通讯作者:
N. Imai
N. Imai
中科院分区:
地球科学2区
文献类型:
--
作者:
S. Terashima;N. Imai

文献摘要

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用连续氢化物发生-原子吸收光谱法测定了52个地球化学标准样品(ANRT、GIT-IWG、USGS、NIST和GSJ)中硒的含量。通过在6 mol l−1 HCl溶液中加热,将消化溶液中的硒(VI)预还原为硒(IV)。在普通地质样品中,硒的检测限为3 ng g−1。用标准加入法分析了一些含有大量重金属的样品。报告的结果和公布的数据之间的协议是令人满意的。 不同来源的硒标准品(ANRT、GIT-IWG、USGS、NIST和GSJ)的技术参数不能通过生成连续的水溶液和原子吸收光谱来确定。在溶液中,硒VI埃特预先还原为硒IV,与6摩尔-1的HCl溶液混合。在大型地质仪器中,硒的检测极限为3 ng g−1。通过剂量技术对含大量金属粉末的机械装置进行了埃特分析。通过对获得的结果和获得的结果进行比较,结果令人满意。
The selenium content of fifty two geochemical reference samples, issued by several reference material producers (ANRT, GIT-IWG, USGS, NIST and GSJ) has been determined by continuous hydride generation and atomic absorption spectrometry. Selenium(VI) in the digested solutions was pre-reduced to selenium(IV) by heating in 6 mol l−1 HCl solution. The limit of detection was 3 ng g−1 selenium in common geological samples. Some samples which contain a large amount of heavy metals were analysed by the standard addition technique. The agreement between the reported results and published data is satisfactory. Les teneurs en Selenium de 52 echantillons standard de reference d'origine differente (ANRT, GIT-IWG, USGS, NIST et GSJ) ont ete determinees par generation continue d'hydrure et spectrometrie d'absorption atomique. Dans les solutions d'attaque, le Selenium VI a ete pre-reduit en Selenium IV par chauffage avec une solution HCl 6 mole−1. La limite de detection etait de 3 ng g−1 de selenium dans la majorite des echantillons geologiques. Quelques echantillons, contenant des grandes quantites de metaux lourds ont ete analyses par la technique des ajouts doses. La comparaison entre les resultats obtenus et les donnees publiees est satisfaisante.