石灰窒素分析法の研究(第3報)

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書誌事項

タイトル別名
  • Studies on Analysis of Calcium Cyanamide.III.
  • Rapid Estimation of Urea by Decomposition with Nitric Acid and Pressure
  • 加圧硝酸分解による尿素の迅速定量法

抄録

Urea is-present, together with dicyan diamide, in weathered or hydrated calcium cyanamide.The ditermination of urea in such case is usually made by urease or xanthohydrol method, but these methods are rather complicated, require longer period of time for the estimation and are not suitable methods to be applied for plant testing method. Since the rapid estimationof dicyan diamide, as described in the second report of this series, gives higher value than that estimated by the official method when the sample contained urea, the reaction of<BR>CO(NH2)2+2HNO3→2NH4NO3+CO2<BR>is applied with pressure and confirmed that the reaction is quantitatively completed within 2.53.0 hours. Thus, the quantitative estimation of urea in a very short time is established with satisfactory result by application of this reaction.

収録刊行物

  • 分析化学

    分析化学 3 (3), 195-196, 1954

    公益社団法人 日本分析化学会

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