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
潘扬昌,黄璐璐,梁勇,莫达松,盘扬桂,苏云鹏
广西壮族自治区分析测试研究中心,南宁 530022
Determination of 5 volatile halogenated hydrocarbons in room air by activated carbon adsorption-thermal desorption-gas chromatography
潘扬昌,黄璐璐,梁勇,莫达松,盘扬桂,苏云鹏
(Guangxi Zhuang Autonomous Region Center for Analysis and Test Research, Nanning 530022, China)
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20~500 μg/m3 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2.7~5.3 μg/m3。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。
Abstract: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
Keywords:activated carbon adsorption; thermal desorption; gas chromatography; room air; volatile halogenated hydrocarbon
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)
本文引用格式:
潘扬昌,黄璐璐,梁勇,等. 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[J]. 化学分析计量,2018,27(4):21-24.
PAN Y C,HUANG L L,LIANG Y,et al. Determination of 5 volatile halogenated hydrocarbons in room air by activated carbon adsorption-thermal desorption-gas chromatography[J]. Chemical analysis and meterage,2018,27(4):21-24.
相似文章: