機器放射化分析法による単体硫黄中のセレンとテルルの定量

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書誌事項

タイトル別名
  • Determination of selenium and tellurium in elemental sulfur by instrumental neutron activation analysis
  • キキ ホウシャカ ブンセキホウ ニヨル タンタイ イオウチュウ ノ セレン ト

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抄録

A rapid and precise method for the determination of selenium and tellurium was developed by means of an instrumental neutron activation analysis. The method was successfully applied to the analysis for trace quantities of selenium and tellurium contained in natural sulfur deposits around craters or fumaroles. The 79mSe and 131Te nuclides were used for a simultaneous determination of selenium and tellurium. When a very high sensitivity was required, a short-lived 77mSe was measured because its production rate was about 50 times higher than that of 79mSe. Powdered samples of sulfur were irradiated in Musashi Institute of Technology Reactor at a thermal neutron flux of 1×1012 n cm-2 s-1 either for 5 min with 200 s detection for the simultaneous determination of selenium and tellurium or for 10 s with 30 s detection for the trace determination of selenium, with a Ge(Li) detector coupled to a multichannel analyzer. Spectrum data were analysed with a mini-computer. All measurements were practically free from interference due to 32P induced in sulfur with the methods. Reproducibility of the results was found within 10 % when the synthetic mixtures of elemental sulfur with selenium and tellurium were analysed by the present methods. The agreement between the results obtained with both 79mSe and 77mSe was satisfactory. Selenium and tellurium in the natural elemental sulfur was precisely and rapidly analysed by the present method.

収録刊行物

  • 分析化学

    分析化学 28 (12), 738-743, 1979

    公益社団法人 日本分析化学会

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