鉄及び鋼中窒素蒸留装置の改良

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  • An improvement of steam distillation apparatus for the determination of nitrogen in iron and steel
  • テツ オヨビ コウチュウ チッソ ジョウリュウ ソウチ ノ カイリョウ

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An improvement of steam distillation apparatus for the determination of nitrogen in iron and steel by means of acid dissolution method was accomplished. The apparatus consisted of three parts, a steam generation flask, a distillation tower being equipped with sample solution flask and a water cooling tube. The steam generator and the sample solution flasks commonly used had been a round-bottom type flask, but a pumpkin type flask was replaced in order to increase the distillation efficiency in this experiment. The distillation tower was made up with a triplicate tube. The steam from the generator was blowed into the sample solution through the most inside tube. The evolved gas from the sample solution was heated during its rise through the space between above-mentioned tube and the outer one. Then, the evolved gas was aircooled and condensed at the wall of the most outside tube. The distillation recovery of ca. 100% for nitrogen was obtained with 150 ml of distillate for ca. 8 min distillation time. The coefficient of variation was ca. 1% for 500 μg of nitrogen in standard solution.

収録刊行物

  • 分析化学

    分析化学 28 (2), T1-T5, 1979

    公益社団法人 日本分析化学会

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