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建立了微量光气的测定方法。光气能与苯胺反应生成等摩尔二苯脲,以苯胺吸收所测气体中的光气,在752型分光光度计上测定二苯脲的消光值。再计算所测气体中的光气量。测定范围在0～6mg/m~3。
A method for the determination of trace phosgene was established. Phosgene can react with aniline to form an equimolar diphenyl urea, absorb the phosgene in the measured gas with aniline, and measure the extinction of diphenyl urea on a 752 spectrophotometer. Calculate the amount of phosgene in the gas to be measured. The measuring range is 0 ~ 6mg / m ~ 3.