アニリン吸収液を用いるハロゲン化カルボニルの定量におけるsym-ジフェニル尿素への変換率の簡易評価法

概要

論文の詳細を見る
A method was investigated to evaluate the conversion efficiency of carbonyl halide into sym-diphenyl urea (DPU) without the measurement of recovery. The combustion gas of vinyl chloride monomer from a diffusion burner was used as a sample gas, and the gas was divided into two flows with almost the same flow rates of 0.4 1/min. These two flows were passed in parallel through two bubblers containing 20 ml of aniline absorbing solution for 8 min at different sampling conditions, and DPU formed in the absorbing solution was determined by high performance liquid chromatography. When a condition in which carbonyl halide could be quantitatively converted into DPU would be adopted for one of the gas flows (A), the conversion efficiency in the condition for the other (B) could be evaluated from the ratio of analytical value of DPU of B to that of A. No difference could be detected between the conversion efficiencies with induction tube length of 20 and 40 cm. The efficiency and recovery was at a plateau (94〜97 %) in the aniline concentration range of not less than 0.8 %. The residual gas after explosion of a mixed-gas containing trifluorobromomethane was also used as a sample, and similar results were obtained.
社団法人日本分析化学会の論文
1985-04-05