低浓度挥发性有机化合物被动式个体采样器的研究  

Passive personal sampler for exposure to low concentration of volatile organic compounds

作　　者：徐东群[1] 崔九思[1] 王斌[1] 宋瑞金[1] 陈国平 

机构地区：[1]中国预防医学科学院环境卫生监测所

出　　处：《卫生研究》1999年第4期246-248,共3页Journal of Hygiene Research

基　　金：国家自然科学基金

摘　　要：研制了扩散式挥发性有机化合物（ＶＯＣｓ）个体采样器，适用于对环境空气中和非职业性个体接触ＶＯＣｓ的监测。在风速１０～２６０ｃｍ／ｓ，相对湿度为３０％～８０％，温度为１０～３０℃的范围内使用，采样速率分别为苯：２５．７４ｍｌ／ｍｉｎ，甲苯：２５．１６ｍｌ／ｍｉｎ，四氯乙烯：２５．８５ｍｌ／ｍｉｎ，对－二甲苯：８．１６ｍｌ／ｍｉｎ，苯乙烯：６．４７ｍｌ／ｍｉｎ。与主动式活性炭纤维（ＡＣＦ）管采样法比较，本个体采样器测定空气中靶ＶＯＣｓ的总不确定度均在±２５％以内。A passive personal sampler has been developed for monitoring volatile organic compounds(VOCs) in ambient air and nonoccupational exposure.The sampler collecting target VOCs is based upon the mechanism of molecular diffusion and absorption onto a single layer of active carbon fibre (ACF) absorbent.After exposure,the ACF is transferred from the sampler into stainless steel tubes for thermal desorption.The desorbed target VOCs is analyzed by capillary GC.Under the condition of facing velocity of 10～260cm/s,relative humidity of 30%～80%,and temperature of 10～30℃,the sampling rate for benzene,toluene,tetrachloroethylene, p xylene and styrene is 25 74, 25 16, 25 85, 8 16 and 6 47ml/min respectively.The analysis on the new passive sampler demonstrated that its relative overall uncertainty for target VOCs was in the range of ±25% compared with the active ACF tube sampling method.

关 键 词：挥发性 有机化合物 被动式 个体采样器 

分 类 号：X830.1[环境科学与工程—环境工程]