CAJ | 학술논문

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5.4～10.3 ng,最低检出浓度0.01～0.1 mg/m~3(采样体积0.5 L).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0.001～0.01 mg/m~3;其中烯烃类检出限为0.4～2.7 ng、烷烃类为1.4～3.7 ng、芳香烃类为0.2～1.0 ng、萘为2.2 ng;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400～4000 ng,其余化合物的穿透容量均大于10000 ng;稳定性实验中,除2,2-二氯丙烷、溴二氯甲烷在15 d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.
채용Tenax-TA흡부제관채집공작장소공기중54충휘발성경류화합물,경열탈부-기상색보검측.결과현시,1,1-이록을희、이록갑완、1,2-이록을희(반식)、1,2-이록을희(순식)、2,2-이록병완、추록갑완、1,1,1-삼록을완、1,2-이록을완、1,1-이록병희적상관계수재0.9941～0.9986지간,추록갑완、이추갑완、삼록갑완、추이록갑완、2,2-이록병완、이추록갑완、추방적검출한위5.4～10.3 ng,최저검출농도0.01～0.1 mg/m~3(채양체적0.5 L).기여38충휘발성경류물질적상관계수균대우0.999,최저검출농도0.001～0.01 mg/m~3;기중희경류검출한위0.4～2.7 ng、완경류위1.4～3.7 ng、방향경류위0.2～1.0 ng、내위2.2 ng;54충휘발성경류물질적열탈부효솔92.1%～113.1%,RSD위 0.6%～17.4%,제1,2-이록을희(순식)、1,1-이록을완、1,1,1-삼록을완、1,1-이록을희、2,2-이록병완、삼록갑완、1,2-이록을희(반식)、이록갑완、추록갑완적RSD치재5.1%～17.4%외,기여45충휘발성경류물질적RSD균소우5%;9충화합물적천투용량400～4000 ng,기여화합물적천투용량균대우10000 ng;은정성실험중,제2,2-이록병완、추이록갑완재15 d내손실솔위10%～15%,기여52충화합물손실솔소우5%.본방법가용우공작장소공기중휘발성경류물질검측,차쾌속、준학.
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 bromochloromethane, dibromomethane, trichloromethane, bromodichloromethane, 2,2-dichloropropane, dibromochloromethane, bromoform were 5.4-10.3 ng, the minimum detectable concentration was 0.01-0.1 mg/m~3 (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/m~3. 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 volatile hydrocarbons in workplace air.