Spectrophotometric Determination of Nitrate-Nitrogen in Groundwaters Using Hydrophobic Reagent Anisole

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  • アニソールを用いる地下水中の硝酸態窒素の吸光光度定量
  • アニソール オ モチイル チカスイチュウ ノ ショウサンタイ チッソ ノ キュウコウ コウド テイリョウ

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Abstract

A spectrophotometric method to determine nitrate-nitrogen was developed based on the reaction of anisole with nitrate in the presence of sulfuric acid and sodium chloride. Anisole was added as its methanol solution to give homogeneous color-developed solutions. Color development is probably ascribed to the formation of a nitroso-dervative of anisole caused by nitrosyl chloride, which resulted from the reaction of nitrate and chloride under strongly acidic conditions. The nitrate-nitrogen contents in well-water samples determined by the present method were in good agreement those determined by ion chromatography. The sensitivity of the present method is higher than those of similar methods based on water-soluble aromatic compounds.<br>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 56 (3), 167-171, 2007

    The Japan Society for Analytical Chemistry

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