Visual Determination Method of Chromium(VI) in River Water Using a Thixotropic Gel

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  • Ohmori Kunikazu
    Kanagawa Institute of Technology, Faculty of Engineering, Department of Applied Chemistry
  • Saito Takashi
    Kanagawa Institute of Technology, Faculty of Engineering, Department of Applied Chemistry

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Other Title
  • チキソトロピーゲルを用いる河川水中の六価クロムの目視定量法
  • チキントロピーゲルを用いる河川水中の六価クロムの目視定量法
  • チキントロピーゲル オ モチイル カセン スイチュウ ノ 6カ クロム ノ モクシ テイリョウホウ

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Abstract

A simple and rapid analysis of Cr(VI) in river-water samples using a thixotropic gel has been developed. Diphenylcarbazide was dissolved in a thixotropic gel that produces a sol-gel transition upon shaking. Efficient extraction and rapid coloring for Cr(VI) were obtained by using thixotropic gel. A sample water and buffer solution was added into a sample tube with the thixotropic gel, which was shaken for one minute. The Cr(VI) concentration was determined visually and by an absorption photometric analysis, based on the color intensity of colored thixotropic gel. The determinable concentration ranged from 0.03 to 1.00 mgCr/dm3 for the visual measurement and 7.36×10−3 to 1.00 mg/dm3 for the absorption photometric analysis. No effect of coexisting ions for Cr(VI) determination was recognized.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 58 (9), 801-805, 2009

    The Japan Society for Analytical Chemistry

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