Mass Spectrometry Study of OH-initiated Photooxidation of Toluene
- Received Date: 2011-06-30
- Toluene, Secondary organic aerosol, Smog chamber, Desorption/ionization, Reaction mechanism
Abstract: The composition of products formed from photooxidation of the aromatic hydrocarbon toluene was investigated. The OH-initiated photooxidation experiments were conducted by irradiating toluene/CH3ONO/NO/air mixtures in a smog chamber, the gaseous products were detected under the supersonic beam conditions by utilizing vacuum ultraviolet pho-toionization mass spectrometer using synchrotron radiation in real-time. And an aerosol time-of-flight mass spectrometer was used to provide on-line measurements of the individ-ual secondary organic aerosol particle resulting from irradiating toluene. The experimen-tal results demonstrated that there were some differences between the gaseous products and that of particle-phase, the products of glyoxal, 2-hydroxyl-3-oxo-butanal, nitrotoluene, and methyl-nitrophenol only existed in the particle-phase. However, furane, methylglyoxal, 2-methylfurane, benzaldehyde, cresol, and benzoic acid were the predominant photooxidation products in both the gas phase and particle phase.
|Citation:||Ming-qiang Huang, Wei-jun Zhang, Zhen-ya Wang, Li Fang, Rui-hong Kong, Xiao-bin Shan, Fu-yi Liu, Liu-si Sheng. Mass Spectrometry Study of OH-initiated Photooxidation of Toluene[J]. Chinese Journal of Chemical Physics , 2011, 24(6): 672-678. doi: 10.1088/1674-0068/24/06/672-678|