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罐采样-预浓缩/气相色谱-质谱联用测定污染源废气中118种挥发性有机物
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作者单位
李光辉,蒋斌,王思行,李成,袁斌,王伯光,张展毅 1.暨南大学环境与气候研究院
2.粤港澳环境质量协同创新联合实验室 
基金项目:国家重点研发计划项目(2018YFC0213904);2019年广东省科技创新战略专项资金项目(2019B121205004)
中文摘要:该文采用预浓缩/气相色谱-质谱联用仪(配FID检测器)结合Dean Switch中心切割和冷柱箱技术,建立了一针进样同时测定污染源废气中118种挥发性有机物(VOCs)的分析方法。废气样品采用苏玛罐收集,稀释后进系统分析,其中C2~C3组分在FID上测定,外标法定量;其他目标物在质谱(MS)上测定,内标法定量。结果显示,118种VOCs在0.5~30 nmol/mol浓度范围内线性良好,相关系数(r2)为0.995 3~0.999 9,方法检出限为0.01~0.38 μg·m-3,定量下限为0.03~1.51 μg·m-3;在低、中、高3个加标水平下的回收率为76.4%~110%,相对标准偏差(RSD,n=7)为0.30%~6.0%。将其应用于移动污染源(叉车)及固定污染源(制鞋厂、家具厂、印刷厂、塑料厂、造船厂)废气样品中VOCs的测定,均有不同程度的检出,其中叉车尾气中总VOCs(TVOC)含量为33.50~35.25 mg·m-3,固定污染源废气中TVOC为44.54~211.71 mg·m-3。该方法简便快速、稳定灵敏、准确度高,适用于移动污染源和固定污染源废气中VOCs的定性定量分析。
中文关键词:挥发性有机物  预浓缩  气相色谱-质谱联用  源排放  苏玛罐
 
Compounds in Source Emission by Canister Sampling-Preconcentration/Gas Chromatography-Mass Spectrometry
Abstract:An analytical method was established for the determination of 118 volatile organic compounds(VOCs) in source emission by preconcentration/gas chromatography-mass spectrometry with FID detector,in combination with Deans Switch and cold oven technique.Samples were collected with a summa canister,and diluted before analysis.C2-C3 compounds were determined with FID,and quantified by external standard method.The remaining compounds were determined by mass spectrometry(MS),and quantified by internal standard method.Results showed that the calibration curves for 118 VOCs exhibited good linearity in the concentration range of 0.5-30 nmol/mol,with the correlation coefficients(r2) of 0.995 3-0.999 9.The limits of detection and the limits of quantification were in the ranges of 0.01-0.38 μg·m-3 and 0.03-1.51 μg·m-3,respectively.The average recoveries at low,medium and high spiked levels ranged from 76.4%to 110%with the relative standard deviations(RSDs,n=7) of 0.30%-6.0%.The method was applied to the determination of VOCs in the exhaust gases of mobile source(forklift) and stationary sources(shoe factory,furniture factory,printery,plastic factory and shipyard).Different degrees of VOCs pollution were detected,in which concentrations of total VOCs(TVOC) in exhaust gases from the forklift and stationary sources were 33.50-35.25 mg·m-3 and 44.54-211.71 mg·m-3,respectively.The method was simple,rapid,stable,sensitive and accurate,and was suitable for the determination of VOCs in mobile and stationary source emissions.
Key Words:volatile organic compounds  preconcentration  gas chromatography-mass spectrometry  source emission  summa canister
引用本文:李光辉,蒋斌,王思行,李成,袁斌,王伯光,张展毅.罐采样-预浓缩/气相色谱-质谱联用测定污染源废气中118种挥发性有机物[J].分析测试学报,2020,39(12):1441-1450.
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