Simultaneous determination of impurities in barium titanate by ICP-AES.

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  • 誘導結合プラズマ発光分析法によるチタン酸バリウム中の不純物の定量
  • ユウドウ ケツゴウ プラズマ ハッコウ ブンセキホウ ニ ヨル チタンサン バ
  • 誘導結合プラズマ発光分析法によるチタン酸バリウム中の不純物の定量(<特集>無機材料分析のためのスペクトロメトリー)

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Abstract

ICP-AES was used for the determination of impurities (Al, Ca, Fe, Mg, Mn, Na, Si and Sr) in barium titanate. Barium titanate powder sample, 0.2 g, was fused with 0.7 g of lithium tetraborate at 1000°C for 15 min in a platinum crucible. The fused sample was dissoloved with 8 ml of (1+1) hydrochloric acid at 150200°C for about 30 min, and diluted with deionized-distilled water to 50 ml, followed by ICP-AES measurement. Lithium tetraborate, barium and titanium as matrix components reduced the analytical line intensity of calcium about 30% and increased the background level about 30% at Cal 422.67 nm. Such a behavior was also found for the other elements determined. By ionization interferences from strontium and barium matrices, the analytical line intensities of calcium and magnesium were increased. For the preparation of calibration curves, matrix of the standard solution was matched with that of the sample solution, i. e. the contents of barium titanate, lithium tetraborate and hydrochloric acid were the same in both solutions. The relative standard deviation was 0.141.62%. The analytical values of 9 kinds of commercial barium titanate samples (purity 98.099.8%) were in good agreement with those by atomic aborption and flame emission spectrometry.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 35 (8), 631-635, 1986

    The Japan Society for Analytical Chemistry

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