コンプトン散乱を利用した蛍光X線吸収補正式による鉄の定量

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タイトル別名
  • XRF determination of iron with absorption correction using Compton scattering.
  • Ｃｏｍｐｔｏｎ散乱を利用した蛍光Ｘ線吸収補正式による鉄の定量
  • コンプトン サンラン オ リヨウシタ ケイコウ Xセン キュウシュウ ホセイシ

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抄録

An absorption correction formula for XRF by using Compton scattering was developed based on the following principles: the intensity of Compton scattering is linearly related to the reciprocal of mass absorption coefficient; the difference of the mass absorption coefficients between the longer and the shorter wavelength sides of the absorption edge is proportional to the concentration of the analyte; the product of the effective mass absorption coefficient and the fluorescence intensity is also propotional to the concentration of the analyte; the ratio of mass absorption coefficients of the sample to those of the analyte at each side of the absorption edge of the analyte is almost constant. An instrumental geometrical factor and an equivalent wavelength were obtained experimentally. All of the other factors were calculated with the mass absorption coefficients of Fe. The concentration of Fe was determined by using Compton intensity of Mo Kα and fluorescent X-ray intensity of Fe Kα. This formula may be applicable to the determination of the heaviest element in lighter elements matrix. With the conventional fundamental parameter method, Fe concentration in a sample containing such element as hydrogen, carbon or oxygen could not be determined. The present equation is applicable over all concentration ranges with the absolute error of 3%.

収録刊行物

  • 分析化学

    分析化学 37 (10), 538-543, 1988

    公益社団法人 日本分析化学会

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