A study on the errors of background correction by deuterium lamp in atomic absorption spectrophotometry

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  • NAKAMURA Susumu
    Analytical Chemistry Division, National Chemical Laboratory for Industry
  • KAWASE Akira
    Analytical Chemistry Division, National Chemical Laboratory for Industry

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Other Title
  • 原子吸光分析における重水素ランプによるバックグラウンド補正の誤差の検討
  • ゲンシ キュウコウ ブンセキ ニ オケル ジュウスイソ ランプ ニヨル バック

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Description

The determination of trace elements in a complex matrix by flame or graphite furnace atomic absorption gives rise to serious background correction problems. Background light losses were found to result from light scattering, molecular absorption and atomic absorption due to the matrix. To solve these problems the elements of interest should be separated from the matrix and/or a correction should be made for background light losses with a continuum light source. This paper dealt with the errors of background correction with a deuterium lamp in atomic absorption spectrophotometry. With a system like the Massmann graphite tube furnace the background absorption changed with time and its distribution was heterogeneous. In this case, the major source of the error was due to the difference in the size of beams and also due to the hollow cathode lamp not being adequately aligned with respect to the deuterium beam. With the system of flame atomic absorption spectrometry, the background absorption was homogeneous and stable. In this case, the major source of the error turned out to result from the stray light caused by the deuterium lamp.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 28 (2), 86-91, 1979

    The Japan Society for Analytical Chemistry

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