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氢化物发生-原子荧光光谱法测定土壤样品中不同价态的硒

薛超群, 郭敏

薛超群, 郭敏. 氢化物发生-原子荧光光谱法测定土壤样品中不同价态的硒[J]. 岩矿测试, 2012, 31(6): 980-984.
引用本文: 薛超群, 郭敏. 氢化物发生-原子荧光光谱法测定土壤样品中不同价态的硒[J]. 岩矿测试, 2012, 31(6): 980-984.
XUE Chao-qun, GUO Min. Analysis of Different Valence States of Selenium in Geological Samples by Hydride Generation-Atomic Fluorescence Spectrometry[J]. Rock and Mineral Analysis, 2012, 31(6): 980-984.
Citation: XUE Chao-qun, GUO Min. Analysis of Different Valence States of Selenium in Geological Samples by Hydride Generation-Atomic Fluorescence Spectrometry[J]. Rock and Mineral Analysis, 2012, 31(6): 980-984.

氢化物发生-原子荧光光谱法测定土壤样品中不同价态的硒

Analysis of Different Valence States of Selenium in Geological Samples by Hydride Generation-Atomic Fluorescence Spectrometry

  • 摘要: 采用氢化物发生-原子荧光光谱法(HG-AFS)测定土壤样品中Se(Ⅳ)和Se(Ⅵ)时,提取剂的选择是技术的关键。以往的提取剂种类多且不具有针对性,本文对比了不同提取剂的提取能力,确定使用KH2PO4-K2HPO4溶液(pH=8.5)为实验用提取剂,以6 mol/L HCl作为还原剂,沸水浴30 min后HG-AFS测定Se总量,不加热直接测定Se(Ⅳ)含量,以差减法得出Se(Ⅵ)含量。在本实验酸度条件下,加入三价铁盐,可消除共存元素的干扰。方法回收率为90.0%~112.5%,线性范围为0.00~6.00 μg/L,相对标准偏差为5.0%~12.6%(n=11),方法检出限可达到0.347 μg/L。标准物质的测定值与标准值相符。实验证实此方法提取效果好,是测定土壤样品中硒不同价态的可行性方法。
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出版历程
  • 收稿日期:  2011-11-20
  • 修回日期:  2012-04-04
  • 发布日期:  2012-11-09

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