预浓缩—气质联用法测定环境空气中33种消耗臭氧层物质  

Determination of 33 ozone depleting substances in the air with pre-concentration-GC/MS

作　　者：唐诗 孙小五 单丹滢 杜世娟 王超 周伟峰 张帅康 Tang Shi;Sun Xiaowu;Shan Danying;Du Shijuan;Wang Chao;Zhou Weifeng;Zhang Shuaikang(Zhengzhou Ecological Environment Monitoring Center of Henan Province,Zhengzhou 450007,China;National Environmental Analysis and Testing Center,Beijing 100029,China;Beijing Branch,Shimadzu Enterprise Management(China)Co.,Ltd.,Beijing 100020,China;Henan Branch,Shimadzu Enterprise Management(China)Co.,Ltd.,Zhengzhou 450007,China)

机构地区：[1]河南省郑州生态环境监测中心,河南郑州450007 [2]国家环境分析测试中心,北京100029 [3]岛津企业管理(中国)有限公司北京分公司,北京100020 [4]岛津企业管理(中国)有限公司河南分公司,河南郑州450007

出　　处：《能源与环保》2023年第11期82-87,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：联合国环境规划署臭氧秘书处多变基金—制冷维修行业第二阶段HCFCs淘汰管理计划及能力建设项目;中日友好环境保护中心科技发展基金。

摘　　要：使用气相色谱质谱联用仪结合液氮制冷型大气预浓缩仪,建立了环境空气中33种消耗臭氧层物质的离线检测方法。将环境空气样品置于苏玛罐中,样品经填充吸附剂的预浓缩制冷系统除水、除二氧化碳、浓缩富集、脱附后,进入GCMS进行分析,以单离子检测扫描SIM方式进行采集,外标法定量,考查了预浓缩系统条件、质谱条件、气相条件等参数对实验测试结果的影响。对比了各种方法的效果,并评估了在此优化条件下的方法性能,结果显示,所有化合物在20 pg/mL的浓度下,峰面积RSD为0.41%~7.18%,在5~100 pg/mL的浓度范围内线性相关系数均大于0.995,检出限为0.01~1.83 pg/mL。该方法简单易操作、重复性好、检出限低,是环境空气中ODS的理想分析方法。An offline method for detection of 33 ozone depleting substances in ambient air was established using a gas chromatography-mass spectrometry combined with a liquid nitrogen refrigeration atmospheric preconcentration instrument.The ambient air sample was placed in a Suma tank,and after being removed from water,carbon dioxide,concentrated,and adsorbed by a pre-concentration refrigeration system filled with adsorbent,the sample enters GCMS for analysis.Single ion detection scanning SIM was used for collection,and external standard method was used for quantification.The influence of pre-concentration system conditions,mass spectrometry conditions,gas phase conditions,and other parameters on the experimental test results was investigated.The effectiveness of various methods was compared and the performance of the method under these optimized conditions was evaluated.The results showed that all compounds had peak area RSD of 0.41%~7.18%at a concentration of 20 pg/mL,and the linear correlation coefficients were greater than 0.995 within the concentration range of 5~100 pg/mL,with a detection limit of 0.01~1.83 pg/mL.This method is simple,easy to operate,has good repeatability,and low detection limit,making it an ideal analysis method for ODS in ambient air.

关 键 词：气相色谱质谱联用仪 大气预浓缩 环境空气 消耗臭氧层物质ODS 

分 类 号：X830.2[环境科学与工程—环境工程]