中文摘要：

采用Tenax-TA吸附剂管采集工作场所空气中54种挥发性烃类化合物,经热脱附-气相色谱检测。结果显示,1,1-二氯乙烯、二氯甲烷、1,2-二氯乙烯（反式）、1,2-二氯乙烯（顺式）、2,2-二氯丙烷、溴氯甲烷、1,1,1-三氯乙烷、1,2-二氯乙烷、1,1-二氯丙烯的相关系数在0.9941～0.9986之间,溴氯甲烷、二溴甲烷、三氯甲烷、溴二氯甲烷、2,2-二氯丙烷、二溴氯甲烷、溴仿的检出限为5.4～10.3ng,最低检出浓度0.01～0.1mg/m3（采样体积0.5L）。其余38种挥发性烃类物质的相关系数均大于0.999,最低检出浓度0.001～0.01mg/m3;其中烯烃类检出限为0.4～2.7ng、烷烃类为1.4～3.7ng、芳香烃类为0.2～1.0ng、萘为2.2ng;54种挥发性烃类物质的热脱附效率92.1%～113.1%,RSD为0.6%～17.4%,除1,2-二氯乙烯（顺式）、1,1-二氯乙烷、1,1,1-三氯乙烷、1,1-二氯乙烯、2,2-二氯丙烷、三氯甲烷、1,2-二氯乙烯（反式）、二氯甲烷、溴氯甲烷的RSD值在5.1%～17.4%外,其余45种挥发性烃类物质的RSD均小于5%;9种化合物的穿透容量400～4000ng,其余化合物的穿透容量均大于10000ng;稳定性实验中,除2,2-二氯丙烷、溴二氯甲烷在15d内损失率为10%～15%,其余52种化合物损失率小于5%。本方法可用于工作场所空气中挥发性烃类物质检测,且快速、准确。

英文摘要：

A method was developed for the determination of 54 volatile hydrocarbons in workplace air by thermal desorption/gas chromatography-hydrogen flame ionization detector. The workplace air was adsorbed by Tenax-TA thermal desorption tubes,then desorbed by thermal desorption and detected by gas chromatography. The experimental results indicated that the coefficients efficiency of 1,1-dichloroethylene,dichloromethane, trans-1,2-dichloroethylene,cis-1,2-dichloroethylene,2,2-dichloropropane,bromochloromethane,1,1,1-trichloroethane,1,2-dichloroethane,1,1-dichloropropene were 0. 9941-0. 9986. The detection limits of bromo-chloromethane,dibromomethane,trichloromethane,bromodichloromethane,2,2-dichloropropane,dibromochlo-romethane,bromoform were 5. 4-10. 3 ng,the minimum detectable concentration was 0. 01-0. 1 mg/m3 （ the air volume =0.5 L） . The coefficients efficiency of other 38 volatile hydrocarbons was above 0. 999,the minimum detectable concentration were 0. 001-0. 01 mg/m3. The detection limits of alkenes were 0. 4-2. 7 ng,alkanes 1. 4-3. 7 ng,aromatic hydrocarbons 0. 2-1. 0 ng and naphthalene 2. 2 ng. The desorption efficiencies of 54 volatile hydrocarbons were 92. 1%-113. 1% and the relative standard deviations（ RSDs） were 0. 6%-17. 4% . Except for the RSD values of cis-1,2-dichloroethylene,1,1-dichloroethane,1,1,1-trichloroethane,1,1-dichloroethylene,2,2-dichloropropane,trichloromethane,trans-1,2-dichloroethylene, dichloromethane,bromochloromethane were 5. 1%-17. 4% ,those of other volatile hydrocarbons were below 5% ; The experimental results indicated that the breakthrough capacities of 9 volatile hydrocarbons were 400-4000 ng,those of the other volatile hydrocarbons were above 10 μg. Except for the loss rates of 2,2-dichloropropane,bromodichloromethane were 10%-15% in stable experiment,those of other volatile hydrocarbons in Tenax desorption tubes were below 5% ,which indicated that 54 volatile hydrocarbons stored in Tenax tubes were stable. The method is a quick and accurate for the detection of volati