气相色谱-质谱法快速筛查气态制冷剂产品中的热点管控类卤代烃  

Gas Chromatography-Mass Spectrometry for Rapid Screening of Hot Spot Controlled Halogenated Hydrocarbons in Gaseous Refrigerant Products

作　　者：谭丽[1] 刘方[1] 陈烨[1] 李明珠 刘进斌 张静星 TAN Li;LIU Fang;CHEN Ye;LI Mingzhu;LIU Jinbin;ZHANG Jingxing(State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring,China National Environmental Monitoring Centre,Beijing 100012,China)

机构地区：[1]中国环境监测总站,国家环境保护环境监测质量控制重点实验室,北京100012

出　　处：《中国环境监测》2022年第4期227-235,共9页Environmental Monitoring in China

基　　金：国家重点研发计划项目(2019YFC0214503)。

摘　　要：建立了利用气相色谱-质谱法快速筛查气态制冷剂产品中的10种热点管控类卤代烃的分析方法。采用气密性微量注射器对气态制冷剂样品进行取样,刺透瓶盖隔垫加入到顶空瓶中,自动进样;以GS-GasPro(多孔层开管,60 m×0.32 mm)为色谱柱,采用电子轰击离子源,全扫描模式采集。测试结果显示:目标物的体积分数在0.50%~100.00%范围内,相对响应因子的相对标准偏差(RSD)均小于20%;线性相关系数r均在0.999以上;检出限(3.143倍标准偏差)为0.01%~0.05%。对实际样品进行加标回收,回收率为79.5%~102%,测定值RSD为0.5%~3.1%。该方法可为快速、准确、批量筛查气态制冷剂产品中的多种热点管控类卤代烃提供技术支撑。An analytical method for rapid screening of 10 hot spot controlled halogenated hydrocarbons of CFC-12,HCFC-22,HCFC-124,HCFC-142b,HFC-23,HFC-32,HFC-125,HFC-143a,HFC-134a,and HFC-152a in gaseous refrigerant products by gas chromatography-mass spectrometry(GC-MS)was established in this paper.The sample of gaseous refrigerants was used with automatic injection,which was transferred with a gas tight syringe,then injected into the headspace bottle through the cap spacer.GS-GasPro column(open tube with porous layers,60 m×0.32 mm)was used to separate 10 target compounds.The MS source was the electron impact in the scan mode.The relative standard deviations of the relative response factors for the 10 targets in the range of volume percentage 0.50%to 100.00%were all less than 20%.The linear correlation coefficients of 10 targets in the range of volume percentage 0.50%-100.00%were above 0.999,and the detection limits of 10 halohydrocarbons were in the range of volume percentage 0.01%-0.05%.The method was applied to actual gaseous refrigerant samples.The recoveries were 79.5%-102%,and the relative standard deviations were 0.5%-3.1%.This method provides technical support for rapid and accurate batch screening of various hot spot controlled halogenated hydrocarbons in gaseous refrigerant products.

关 键 词：顶空进样 气相色谱质谱法 气态制冷剂 卤代烃 蒙特利尔议定书 

分 类 号：X830.2[环境科学与工程—环境工程]