Determination of Silicon in Industrial Materials Using Continuous Flow Analysis

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  • 連続流れ分析装置を用いる工業材料中のケイ素分析
  • レンゾク ナガレ ブンセキ ソウチ オ モチイル コウギョウ ザイリョウ チュウ ノ ケイソ ブンセキ

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Abstract

<p>A continuous-flow analyzer for silicon has been developed and applied to the determination of silicon in industrial material. The sample, prepared as a hydrofluoric acid solution, is injected into an air segmentation of sulfuric acid and silicon tetrafluoride gas is produced in the mixing coil. The silicon tetrafluoride gas is absorbed in a boric acid solution, which is then subjected to a spectrophotometric determination of silicon as blue molybdosilicic acid. All of the required chemical processes are conducted in a closed system, so that a blank value is kept at low levels. The analyzer was successfully applied to determination of silicon at the 0.29 μg g−1 level in Ta2O5. It also enabled the determination of silicon in brass, iron and organic reagents.</p>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 70 (4.5), 255-260, 2021-04-05

    The Japan Society for Analytical Chemistry

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