有機物マトリックス中の微量元素の直接定量を目的とした単色化Ｘ線源を用いるエネルギー分散型蛍光Ｘ線装置の開発

DOI NDLデジタルコレクション Web Site Web Site 被引用文献6件 参考文献25件

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  • Development of energy dispersive X-ray fluorescence spectrometer with monochromatic excitation for the direct determination of trace elements in organic matrices.
  • ユウキブツ マトリックスチュウ ノ ビリョウ ゲンソ ノ チョクセツ テイリョ

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An energy dispersive X-ray fluorescence spectrometer (EDXRF) with monochromatic excitation has been developed for the direct determination of trace elements in organic matrices. Monochromatization of X-rays by a crystal monochromator is effective in improving the signal to background ratio.Detection limits are less than 0.1 μg g-1 by monochromatic excitation of Mo-Kα (17.4 keV) X-ray tube. But Ag, Cd and Sn can't be determined. The newly-constructed EDXRF with a combination of three monochromatic excitations (9.7, 17.4 and 40keV), can offer a higher sensitivity for the elements of atomic number larger than 22 (Ti). At optimum conditions, detection limits of 0.020.34 μg g-1 (mean value, 0.13 μg g-1) are ascertained for the 22 elements determined (TiHg and Bi), and satisfactory precision (within 1% R.S.D.) is obtained. The proposed method is applied to the direct determination of trace elements in the NIST fuel oil (SRM 1634b), and others. The results are in good agreement with the certified values.

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  • 分析化学

    分析化学 45 (10), 933-939, 1996

    公益社団法人 日本分析化学会

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