A Simple Visual Method for the Determination of Arsenic in Environmental Water by a Column Impregnated with Potassium Permanganate

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  • YAMADA Yoriko
    Interdisciplinary Graduate School of Science and Engineering, Shimane University
  • SUGAHARA Shogo
    Interdisciplinary Graduate School of Science and Engineering, Shimane University
  • SEIKE Yasushi
    Interdisciplinary Graduate School of Science and Engineering, Shimane University
  • OKUMURA Minoru
    Interdisciplinary Graduate School of Science and Engineering, Shimane University

Bibliographic Information

Other Title
  • 過マンガン酸カリウム含浸カラムを用いる環境水中ヒ素の簡易目視定量法
  • カマンガンサン カリウム ガンシン カラム オ モチイル カンキョウ スイチュウ ヒソ ノ カンイ モクシ テイリョウホウ

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Abstract

A simple visual method for the determination of arsenic in environmental water after collecting arsenic as arsine in a column packed with silica gel impregnated with potassium permanganate has been developed. The column was prepared as follows: Silica gel (0.4 g) was put into a plastic column (inside diameter 4 mm; column length 110 mm). A potassium permanganate solution and air were passed through the plastic column successively, and then the column was colored red-purple. To 40 mL of the sample solution, potassium iodide, tin(II) chloride, zinc sand and a 6 M hydrochloric acid solution were added to liberate arsine. When the liberated arsine was passed through the column, a colored-band (brown band) appeared in the column (red-purple) because of manganese dioxide (brown) formed by the reduction of potassium permanganate (red-purple) with arsine. There was a good relationship between the length of colored-band and the concentration of arsenic. The concentration of the total inorganic arsenic [As(III) + As(V)] was measured based on the length of the colored band in the column. The established method was applied to hot spring water samples containing high concentrations of iron(II) ion. Significant amounts of arsenic in the hot spring waters were found to be removed from water by the adsorption and/or coprecipitation of arsenic with an iron(III) hydroxide precipitate, which was formed by the oxidation of iron(II) ion.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 63 (8), 671-677, 2014

    The Japan Society for Analytical Chemistry

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