关键词: 推进剂污染;甲基肼;大气监测;吸收光谱分析

Abstract: The test procedure of monomethylhydrazine concentration in air detected by solidsorbent and spectrophotometric method was investigated. The effects of standard gas, sampling tube, acidity of sample, environmental temperature, light source and interfering gas on detecting accuracy were tested. The results shown that when special sampling tube of solid-sorbent was employed and the p-dimethylaminobenzaldehyde was used as color-producing reagent at 470 wave length, the minimum detectable concentration of 0. 0031mg/m3, mean variation coefficient of 0. 036 and relative error of 5. 5% were obtained with 2 cm colorimetric disc and within measurement range of 0. 001mg/m3-2.50mg/m3.

Key words: Propellant Pollution;Monomethylhydrazine;Atmospheric monitoring;Absorption spectrographic analysis