検知管による水中の極微量テトラクロロエチレンの簡易定量法

概要

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Concerning waste water from a laundry machine, use of gas detector tube has been applied to the determination of very small amount of tetrachloroethylene (TCE). In Japan, two kinds of detector tubes for TCE with relatively low sensitivity can be purchased, one is {No. 135S (5〜300 ppm)} and the other is No. 133 (50〜250 ppm). However, detector tube for trichloroethylene made by Kitazawa Co. {No. 132L (2〜25 ppm)} is developed to be useful for the determination of TCE with very high sensitivity. For the analysis, 200 ml of water containing TCE is taken in 500 ml stoppered glass bottle. After shaking, 50 ml of the equilibrated air in the head space is passed through the detector tube (No. 132L) by means of a disposal syringe. Concentration of TCE in water is then calculated by using Henry's constant and the calibration curve for TCE obtained by separate experiments. The detection limit of a gas detector tube is 0.3 ppm, while Henry's constant expressed by ppm TCE in air/ppm TCE in water attains the value of about 70. Consequently the limit of detection of TCE in water is about 0.01 mg/l.
社団法人日本分析化学会の論文
1985-12-05