预浓缩系统——气相色谱/质谱法测定大气中的六氟异丙醇  

Determination of hexafluoroisopropano in atmosphere by preconcentrator and gas chromatography/mass spectrometry

作　　者：贺心然[1,2] 宋晓娟 邓贺天 章露露 

机构地区：[1]河海大学环境学院,江苏南京210098 [2]连云港市环境监测中心站,江苏连云港222001 [3]南京大学环境学院,江苏南京210046 [4]连云港华茵环保科技有限公司,江苏连云港222001

出　　处：《环境污染与防治》2017年第10期1067-1070,共4页Environmental Pollution & Control

基　　金：国家重大环境问题决策支持项目(No.2023004017)

摘　　要：以预浓缩系统—气相色谱(GC)/飞行时间质谱(TOF-MS)法采集、分析大气中六氟异丙醇(HFIP),即HFIP经苏玛罐采样后,加入三氯甲烷内标,直接进入三级冷阱预浓缩系统进行浓缩,然后经过GC/TOF-MS分离、定量。同时,通过条件试验优化前处理条件和分析参数。结果表明,该方法可实现大气中HFIP的准确测定,线性相关系数可以达到0.999,日内和日间精密度均小于5%,加标回收率为85%~94%,当进样体积为200mL时大气中HFIP的检出限为0.01μg/m3。该方法简便、可靠,适用于大气中HFIP的常规和应急监测。A method for the determination of Hexafluoroisopropano （HFIP） in atomosphere was developed by gas chromatography-time of flight mass spectrometer （GC/TOF-MS） coupled with a pre-concentrator. Atmospheric samples were collected by SUMMA canisters,which were treated by silane to minimize the adsorption of HFIP. Rela- tive parameters were optimized after various condition tests. Atmospheric HFIP was pre-concentrated and then intro- duced into GC/TOF-MS. Results showed that the precision, accuracy and correlation coefficient of the method were confirmed to meet the qualification. Linear correlation coefficient was 0.999. The RSD of intra and inter day were both less than 5%. Recoveries were between 85% and 94%. The detection limit was 0.01μg/m3 with 200 mL sample volume. This method was simple and reliable,and was very suitable for the determination of atmospheric HFIP during routine and emergency monitoring.

关 键 词：六氟异丙醇 预浓缩 气相色谱 飞行时间质谱 三氯甲烷 

分 类 号：X831[环境科学与工程—环境工程]