高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (S1): 81.

• Atomic Spectrometry • 上一篇    下一篇

On the Determination of Ultra-trace Amounts of Selenium Using the Twice Hydride Generation -Gaseous Phase Enrichment Techniques and Atomic Fluorescence Spectrometry

GUO Xu-Ming1, GUO Xiao-Wei2, HUANG Ben-Li1   

  1. 1. Department of Chemistry and the Key Laboratory of Analytical Sciences of MOE, Xiamen University, Xiamen 361005, P. R. China;
    2. Northwest Geological Research Institute of CNNC, No. 25, Xiying Road, 710054, Xi'an, China
  • 出版日期:1999-12-31 发布日期:1999-12-31
  • 通讯作者: GUO Xiao-Wei
  • 基金资助:

    Supported by the National Science foundation of China

On the Determination of Ultra-trace Amounts of Selenium Using the Twice Hydride Generation -Gaseous Phase Enrichment Techniques and Atomic Fluorescence Spectrometry

GUO Xu-Ming1, GUO Xiao-Wei2, HUANG Ben-Li1   

  1. 1. Department of Chemistry and the Key Laboratory of Analytical Sciences of MOE, Xiamen University, Xiamen 361005, P. R. China;
    2. Northwest Geological Research Institute of CNNC, No. 25, Xiying Road, 710054, Xi'an, China
  • Online:1999-12-31 Published:1999-12-31
  • Contact: GUO Xiao-Wei
  • Supported by:

    Supported by the National Science foundation of China

PDF (PC)

摘要：

Selenium is the one of the most particularly element to human health. This property has been recognized as an essential nutrient and toxicity at same time for humans. The toxicity and essential nature of Se depend on its concentration, which is within a very narrow range from 0.005 ppm to 3.0 ppm. It is strongly required often to investigate the trace selenium in order to understand the processes of elemental cycles in real samples. However,the direct determination of selenium content and chemical species is very difficult because of their extremely low concentrations and complicated characteristics. Hydride generation technique, which offers the advantages of chemical pre-separation from matrix, more efficient sample introduction, has been widely used in real sample analysis. However, except the so-called "in situ pre-concentration techniques" (trapped in graphite furnace and determined by AAS), the investigation of other gaseous phase enrichment techniques has not been noticed enough.

Abstract:

Selenium is the one of the most particularly element to human health. This property has been recognized as an essential nutrient and toxicity at same time for humans. The toxicity and essential nature of Se depend on its concentration, which is within a very narrow range from 0.005 ppm to 3.0 ppm. It is strongly required often to investigate the trace selenium in order to understand the processes of elemental cycles in real samples. However,the direct determination of selenium content and chemical species is very difficult because of their extremely low concentrations and complicated characteristics. Hydride generation technique, which offers the advantages of chemical pre-separation from matrix, more efficient sample introduction, has been widely used in real sample analysis. However, except the so-called "in situ pre-concentration techniques" (trapped in graphite furnace and determined by AAS), the investigation of other gaseous phase enrichment techniques has not been noticed enough.

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