改良型燃焼フラスコを用いる有機ハロゲンの微量定量 : フラスコ燃焼法による有機元素分析(第4報)

概要

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A rapid method for determination of organic halogens by using an improved combustion flask has been examined in which the sample is decomposed by combustion by using 10% sodium peroxide solution as the absorbent and the pH of the solution was then adjusted with concentrated nitric acid for obtaining clear end point of the titration. In the determination of iodine by the conventional method using direct addition of granulated sodium peroxide, the partly liberated iodine disturbs the color change of indicator, and it must be added just before the end point. By the proposed method, however, iodine can be determined by the same procedure with that for chlorine and bromine in the presence of the indicator from the beginning. The time required for an analysis was about 5 or 6 minutes.
社団法人日本分析化学会の論文