活性炭吸附–热脱附–气相色谱法测定室内空气中5种挥发性卤代烃  

Determination of 5 volatile halogenated hydrocarbons in room air by activated carbon adsorption-thermal desorption-gas chromatography

作　　者：潘扬昌[1] 黄璐璐[1] 梁勇[1] 莫达松[1] 盘扬桂 苏云鹏[1] PAN Yangchang, HUANG Lulu, LIANG Yong, Mo Dasong, PAN Yanggui, SU Yunpeng(Guangxi Zhuang Autonomous Region Center for Analysis and Test Research, Nanning 530022, China)

机构地区：[1]广西壮族自治区分析测试研究中心,南宁530022

出　　处：《化学分析计量》2018年第4期21-24,共4页Chemical Analysis And Meterage

基　　金：广西壮族自治区直属公益性科研院所基本科研业务费专项(2016ACZ02)

摘　　要：建立活性炭吸附–热脱附–气相色谱法测定室内空气中三氯甲烷、四氯化碳、三氯乙烯、四氯乙烯、三溴甲烷5种挥发性卤代烃含量的方法。选用活性炭为固体吸附剂,热脱附进样,温度为300℃,时间为3 min,捕集阱温度为–5℃,采用配有FID检测器的气相色谱仪检测,以保留时间定性,外标法定量。5种卤代烃的质量浓度在20～500μg/m^3范围内与色谱峰面积有良好的线性关系,相关系数大于0.998,方法检出限为2.7～5.3μg/m^3。样品加标回收率为82.6%～107.5%,测定结果的相对标准偏差为7.3%～13.6%(n=6)。该法具有操作简便,结果准确、可靠等优点,可用于室内空气中挥发性卤代烃的检测。A method for the determination of trichloromethane, trichloride, trichloroethylene, four chloroethylene, and three bromo methane in room air by using activated carbon adsorption–thermal desorption–gas chromatography was established. The active carbon was used as a solid adsorbent. The thermal desorption temperature was 300℃ , the thermal desorption time was 3 min, the trap temperature was –5℃ . Gas chromatograph with FID detector was used for detection of 5 kinds of volatile halogenated hydrocarbons thermal desorption sampling. Retention time was used for qualitative analysis and the external standard method was used for quantitative analysis. The mass concentration of the 5 halogenated hydrocarbons had good linearity with the chromatographic peak area in the range of 20–500 μg/m3, the correlation coefficients were more than 0.998, the correlation coefficient was more than 0.998, and the detection limits of the method were 2.7–5.3 μg/m3. The recoveries were 82.6%–107.5%, and the relative standard deviations of determination results were 7.3%–13.6%（n=6）. The method has the advantages of simple operation, accurate and reliable results, and small human error. It can be used for the detection of volatile halogenated hydrocarbons in room air.

关 键 词：活性炭吸附 热脱附 气相色谱法 室内空气 挥发性卤代烃 

分 类 号：O657.7[理学—分析化学]