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  • 标题:水中の微量アンモニア窒素の吸光光度定量
  • 本地全文:下载
  • 作者:平古 場朗 ; 森木 弘樹 ; 石橋 龍吾
  • 期刊名称:Journal of Health Science
  • 印刷版ISSN:1344-9702
  • 电子版ISSN:1347-5207
  • 出版年度:1972
  • 卷号:18
  • 期号:5
  • 页码:342-346
  • DOI:10.1248/jhs1956.18.342
  • 出版社:The Pharmaceutical Society of Japan
  • 摘要:An examination was made on the sensitive spectrophotometric determination of ammonia-nitrogen in water. Ammonia was determined indirectly by measuring the blue complex produced by reaction with potassium iodide-starch reagent and chloramine compound, which was formed by the reaction of ammonia and hypochlorite at pH 5.4. Unreacted hypochlorite was destroyed with ferrous sulfate before addition of potassium iodide-starch reagent. The absorbance of developed color of the blue complex was measured at 570 mμ. The method was applicable for the determination of ammonia-nitrogen in the range of 0.01 to 0.4 ppm, at between 21 and 26°. The standard deviation was 2.2% on an average absorbance 0.496 of a sample containing 0.2 ppm of ammonia-nitrogen.
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