A reinvestigation of low molecular weight components in SOA produced by cyclohexene ozonolysis  

作　　者：Jun Chen Zhao-Hui Li Ye-Peng Yu Xuan Lin Hang Zhang Yan-Bo Li Huan-Huan Wang Rui-Rui Sun Qing-Hui Meng Chao-Qun Huang Xiao-Bin Shan Fu-Yi Liu Chang-Jin Hu Wei-Jun Zhang Liu-Si Sheng 

机构地区：[1]National Synchrotron Radiation Laboratory,School of Nuclear Science and Technology,University of Science and Technology of China [2]Laboratory Medical Optical and Mass Spectrometry,Center of Medical Physics and Technology,Hefei Institutes of Physical Science,Chinese Academy of Sciences [3]Laboratory of Atmospheric Physico-Chemistry,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences [4]School of Environmental Science and Optoelectronic Technology,University of Science and Technology of China

出　　处：《Nuclear Science and Techniques》2018年第11期238-246,共9页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(Nos.11575178,91544105,U1532137,91544228,and U1232130)

摘　　要：The ozonolysis of cyclohexene is an important model system for understanding the more complex reaction of O_3 with monoterpenes; however, many previous studies have come to qualitatively different conclusions about the composition of the secondary organic aerosol(SOA)formed in this system. In the present study, the composition of the SOA produced by cyclohexene ozonolysis in the absence of seed aerosols has been investigated online and off-line using synchrotron-based thermal desorption/tunable vacuum ultraviolet photoionization time-of-flight aerosol mass spectrometry(TD-VUV-TOF-PIAMS) in conjunction with a custom-built smog chamber. On the basis of the molecular ions observed by mass spectrometry at 11.5 e V, it was found that dicarboxylic acids, dialdehydes, and cyclic anhydrides are the predominant low molecular weight components in the particle phase. The results also indicated that TD-VUV-TOF-PIAMS coupled with filter sampling is a potentially useful tool for the investigation of SOA composition both in the field and in the laboratory.The ozonolysis of cyclohexene is an important model system for understanding the more complex reaction of O_3 with monoterpenes; however, many previous studies have come to qualitatively different conclusions about the composition of the secondary organic aerosol(SOA)formed in this system. In the present study, the composition of the SOA produced by cyclohexene ozonolysis in the absence of seed aerosols has been investigated online and off-line using synchrotron-based thermal desorption/tunable vacuum ultraviolet photoionization time-of-flight aerosol mass spectrometry(TD-VUV-TOF-PIAMS) in conjunction with a custom-built smog chamber. On the basis of the molecular ions observed by mass spectrometry at 11.5 e V, it was found that dicarboxylic acids, dialdehydes, and cyclic anhydrides are the predominant low molecular weight components in the particle phase. The results also indicated that TD-VUV-TOF-PIAMS coupled with filter sampling is a potentially useful tool for the investigation of SOA composition both in the field and in the laboratory.

关 键 词：CYCLOHEXENE OZONOLYSIS SOA SMOG CHAMBER Aerosol mass SPECTROMETRY 

分 类 号：TL[核科学技术]