真空紫外光电离质谱法在烟气老化研究中的应用  

Application of Vacuum Ultraviolet Photoionization Mass Spectrometry in the Aging Study of Smoke Aerosols

作　　者：马兰 温作赢 彭晓萌 赵锋 叶绍鑫 谢恺 顾学军[1] 王健[3] MA Lan;WEN Zuo-ying;PENG Xiao-meng;ZHAO Feng;YE Shao-xin;XIE Kai;GU Xue-jun;WANG Jian(Anhui Institute of Optics&Fine Mechanics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230026,China;Key Laboratory of Combustion and Pyrolysis,China Tobacco Anhui Industrial Co,Ltd,Hefei 230088,China)

机构地区：[1]中国科学院合肥物质科学研究院安徽光学精密机械研究所,安徽合肥230031 [2]中国科学技术大学,安徽合肥230026 [3]安徽中烟工业有限责任公司,烟草化学安徽省重点实验室,安徽合肥230088

出　　处：《质谱学报》2024年第5期656-665,共10页Journal of Chinese Mass Spectrometry Society

基　　金：国家自然科学基金(U1832184);安徽中烟工业有限责任公司科技项目(2022305)。

摘　　要：本文应用自主研发的真空紫外光电离飞行时间质谱仪,原位在线检测燃烧型卷烟、加热不燃烧型卷烟和电子烟产生的烟气气溶胶,表征其气相成分及颗粒相成分。结果表明,3种烟气气溶胶的化学组成差异显著,其中燃烧型卷烟的成分含量及物种丰度远大于新型烟草制品,其气相和颗粒相的整体信号强度分别约为新型烟草制品的100倍和10倍。检出的气溶胶成分中含有大量不饱和化合物,这些物质在环境中极易被氧化并生成新的超细颗粒物。结合Teflon反应腔分别模拟以上3种类型的烟气气溶胶在不同臭氧浓度下的老化过程,结果均有超细颗粒物生成。超细颗粒物的形成条件与前体物的含量和成分分布有关,燃烧型卷烟气溶胶在室内O_(3)浓度下就可以很快形成超细颗粒物,而新型烟草制品则需要更高浓度的O_(3)或更长的老化时间。Smoke aerosols contain many harmful substances and have become one of the major sources of indoor pollutants.The smoke aerosols released into the environment are easy to react with various oxidants presented in the room,namely the aging process of the smoke aerosol,which can produce secondary organic aerosols.The chemical composition of smoke aerosol is an important factor affecting its indoor aging process,but so far,the change behavior of the composition and particle size distribution of smoke aerosol during the aging process remains to be studied,and the aging analysis of novel tobacco products has not been reported.Therefore,the present study applied a house-made vacuum ultraviolet photoionization time-of-flight mass spectrometer to detect the chemical composition of the smoke aerosols produced by combustion cigarette,and new tobacco products,e.g.,heat-not-burn tobacco products and e-cigarette,achieving the in-situ online characterization of their gas-phase and particulate-phase components.The results showed that the chemical composition of the smoke aerosols generated by the three types of tobacco products is significantly different,among which the component content and species abundance of the combustion cigarette are much greater than those of the novel tobacco products,and the overall signal intensity of combustion cigarette in the gas-phase and the particulate-phase is about 100 times and 10 times that of novel tobacco products,respectively.In addition,it was found that the particulate-phase mass spectra of novel tobacco products contain a large amount of glycerol,which is almost absent in combustion cigarette,and its intensity is even more than nicotine.The detected aerosol components contain many unsaturated compounds,which are easily oxidized in the environment and generate new ultrafine particles(UFPs).The Teflon chamber was used to simulate the aging process of the above three smoke aerosols with different O_(3) concentrations.The results of scanning mobility particle sizer showed that UFPs are gene

关 键 词：光电离质谱 在线测量 烟气老化 超细颗粒物 室内污染 

分 类 号：O657.63[理学—分析化学]