Determination of copper, calcium, magnesium and bismuth in titanium(IV) oxide by slurry introduction-graphite furnace AAS.

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  • スラリー導入／黒鉛炉原子吸光法による酸化チタン中の銅，カルシウム，マグネシウム及びビスマスの定量
  • スラリー ドウニュウ コクエンロ ゲンシ キュウコウホウ ニヨル サンカ チタ

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Abstract

An analytical method for the determination of trace amounts of copper, calcium, magnesium and bismuth in titanium(IV) oxide was investigated using slurry introduction and direct atomization graphite furnace atomic absorption spectrometry(AAS). We prepared slurries of five commercial titanium(IV) oxide powders, and studied experimental parameters to get optimum atomization conditions for minimal matrix interference.We also analysed those elements by inductively coupled plasma atomic emission spectrometry(ICP-AES) and inductively coupled plasma mass spectrometry(ICP-MS). As a result, with the ICP-AES, each of the elements were affected by matrix spectral interference. With the ICP-MS, the determination of copper, calcium and magnesium suffered from overlapping peaks. For these reasons, neither ICP-AES nor ICP-MS methods produced satisfactory results. In contrast, the present AAS technique gave good results for the determination of the four elements. The lower limits (10σ) with the proposed method were 0.2 μg/g (copper), 1μg/g (calcium), 0.3 μg/g (magnesium) and 0.4 μg/g (bismuth) of sample.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 45 (10), 959-963, 1996

    The Japan Society for Analytical Chemistry

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