GC-MS法测定环境空气中10种臭氧层消耗物质  

Determination of 10 ozone depleting substances in ambient air by GC-MS

作　　者：王明胜 王玺梁 吴晓妍 陈飞 汪晨霖 饶君 WANG Mingsheng;WANG Xiliang;WU Xiaoyan;CHEN Fei;WANG Chenlin;RAO Jun(Ecological and Environmental Monitoring Center of Chongqing,Yubei,Chongqing 401147,China;Fuling No.5 Middle School of Chongqing,Fuling,Chongqing 408000,China;Chongqing Ecological Environment Field Monitoring Technology Research and Application Demonstration Platform,Yubei,Chongqing 401147,China)

机构地区：[1]重庆市生态环境监测中心,重庆渝北401147 [2]重庆市涪陵区第五中学校,重庆涪陵408000 [3]重庆市生态环境现场监测技术研究及应用示范平台,重庆渝北401147

出　　处：《贵州师范大学学报（自然科学版）》2022年第2期46-49,共4页Journal of Guizhou Normal University：Natural Sciences

基　　金：重庆市生态环境监测中心项目(CQHJ-NBKY-2020-05)。

摘　　要：通过建立GC-MS法分析环境空气中10种臭氧层消耗物质。本研究建立了罐采样-气相色谱质谱法测定环境空气中10种臭氧层消耗物质,以内标法定量,准确度高,且目标物涵盖了我国生产消费量大、受控的臭氧层消耗物质。该分析方法前处理简便、检出限低、线性范围宽、精密度高,适用于环境空气中10种臭氧层消耗物质的测定分析。应用此方法在不同时节对重庆市环境空气质量监测点(沙坪坝刘家院)采用罐采样分析,得到环境空气中10种臭氧层消耗物质的平均浓度水平。其中二氟一氯甲烷(HCFC-22)和1,1,1,2-四氟乙烷(HFC 134a)含量水平明显高于其他八种物质,3种臭氧层消耗物质物质(五氟一氯乙烷、二氟一氯乙烷、1,1-二氟乙烷)没有检出。二氟一氯甲烷(HCFC-22)的平均浓度水平在0.81μg/L左右,1,1,1,2-四氟乙烷(HFC 134a)的平均浓度水平在0.25μg/L左右。In this paper,a GC-MS method was established to analyze 10 ozone depleting substances in ambient air.In this study,a tank sampling gas chromatography-mass spectrometry method was established to determine 10 ozone depleting substances in ambient air.The internal standard method is quantitative and has high accuracy,and the target substances cover the controlled ozone depleting substances with large production and consumption in China.The analytical method has the advantages of simple pretreatment,low detection limit,wide linear range and high precision.It is suitable for the determination and analysis of 10 ozone depleting substances in ambient air.By using this method,tank sampling analysis was carried out at Chongqing ambient air quality monitoring point(Shapingba liujiayuan)in different seasons,and the average concentration levels of 10 ozone depleting substances in the ambient air were obtained.Among them,the contents of difluorochloromethane(HCFC-22)and 1,1,1,2-tetrafluoroethane(HFC 134a)were significantly higher than those of the other eight substances,and three ozone depleting substances(pentafluoromonochloroethane,difluoro monochloroethane and 1,1-difluoroethane)were not detected.The average concentration of dichlorodifluoromethane(HCFC-22)is about 0.81μg/L,and the average concentration of 1,1,1,2-tetrafluoroethane(HFC 134a)is about 0.25μg/L.

关 键 词：臭氧层消耗物质 检出限低 线性范围宽 二氟一氯甲烷 

分 类 号：X832[环境科学与工程—环境工程]