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挥发性有机物是指根据有关规定确定的有机化合物,或者参与大气光化学反应的有机化合物. 越来越多的研究表明[1],大气VOCs光化学反应二次产物是颗粒物特别是细颗粒物的重要组成,由VOCs排放导致的城市地区臭氧和雾霾等复合型大气污染会对人类健康和自然环境带来不可逆的危害. 近年来,生态环境部印发了《2018年重点地区环境空气挥发性有机物监测方案》《2019年地级及以上城市环境空气挥发性有机物监测方案》等文件,方案将环境空气挥发性有机物列入监测任务.
本文建立了一种同时测定环境空气挥发性有机物中117种化合物的分析方法,使用罐采样,预浓缩气相色谱质谱联用系统分析,确定了预浓缩、气相色谱、质谱的分析条件,进行了精密度、准确度等测试,为挥发性有机物的管控提供技术支撑.
Suma canister-preconcentrator-gas chromatography mass spectrometry system analyzes 117 volatile organic compounds in atmosphere
- Available Online: 27/06/2023
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Key words:
- ambient air /
- preconcentration /
- GC-MS
Abstract: In this paper, a method for simultaneous analysis of 117 volatile organic compounds in the atmosphere by tank sampling-preconcentration-gas chromatography mass spectrometry system was established, and the reference conditions of pre-concentrator, gas chromatography and mass spectrometer were determined. The methodological indicators such as detection limit, linearity and precision of this method can meet the requirements of HJ759 method and the appendix of the 《2018 Air Volatile Organic Compounds Monitoring Program in Key Areas》, and can meet the monitoring needs of atmospheric volatile organic compounds.