Determination of residual chlorine in tap water with 2,7-fluorenediamine.

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  • MATSUSAKI Koji
    Department of Industrial Chemistry, Technical College, Yamaguchi University
  • MOMOI Masaaki
    Department of Industrial Chemistry, Technical College, Yamaguchi University
  • FUJIMOTO Minoru
    Department of Industrial Chemistry, Technical College, Yamaguchi University

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Other Title
  • ２，７‐フルオレンジアミンを用いる水道水中の残留塩素の定量
  • 2 7 フルオレンジアミン オ モチイル スイドウ スイチュウ ノ ザンリュウ
  • 2,7-フルオレンジアミンを用いる水道水中の残留塩素の定量

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Description

Tap water always contains more than 0.1ppm chlorine for disinfection. The residual chlorine was determined with 2, 7-fluorenediamine(FDA) spectro-photometrically. Ten ml of the sample water, which contained less than 1.5ppm chlorine, was transferred to a 15ml test tube with a ground stopper. One ml of 2M nitric acid and 1ml of 40mg/l FDA solution were added and shaken. After 3min the absorbance was measured at 422nm. The calibration curve showed a straight line which passed through the origin and the molar extinction coefficient was 5.1×104l mol-1 cm-1. Coexisting cations and anions in tap water did not interfere with the determination.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 35 (9), 835-837, 1986

    The Japan Society for Analytical Chemistry

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