Square-wave polarographic determination of bismuth by separating coprecipitation with zirconium hydroxide

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  • 水酸化ジルコニウム共沈法によるビスマスのく形波ポーラログラフ定量
  • スイサンカ ジルコニウム キョウチンホウ ニヨル ビスマス ノ クケイハ ポー

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Abstract

Square-wave polarographic determination of trace amounts of bismuth by separating coprecipitation with zirconium hydroxide was investigated. Thirty-two mg of zirconium oxychloride was added to a (501000) ml solution containing (0.633.15) μg of bismuth, and pH of the solution was adjusted to 9.7 with ammonia-water (1 : 1). The precipitate was separated by filtration and then dissolved in 25 ml of 4 M hydrochloric acid. The solution was diluted to 50 ml with distilled water, and a portion of this solution was subjected to the square-wave polarographic determination. Bismuth was collected most effectively with zirconium hydroxide from the solution adjusted to pH 9.7 with ammonia-water (1:1). The polarographic peak height was in linear relation with the concentration of bismuth in the range of (0.633.15) μg. The coefficient of variation was 1.0%. Among the various foreign ions examined, copper, antimony, zinc and nickel interfered with the polarographic determination remarkably.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 28 (10), 621-623, 1979

    The Japan Society for Analytical Chemistry

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