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J Environ Sci (China)

Title:		A VUV photoionization mass spectrometric study on the OH-initiated photooxidation of isoprene with synchrotron radiation
Author(s):		Pan G; Hu C; Huang M; Wang Z; Cheng Y; Liu Z; Gu X; Zhao W; Zhang W; Chen J; Liu F; Shan X; Sheng L;
Address:		"Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China"
Journal Title:		J Environ Sci (China)
Year:		2012
Volume:		24
Issue:		12
Page Number:		2075 - 2082
DOI:		10.1016/s1001-0742(11)61051-6
ISSN/ISBN:		1001-0742 (Print) 1001-0742 (Linking)
Abstract:		"The gas-phase organic compounds resulting from OH-initiated photooxidation of isoprene have been investigated on-line by VUV photoionization mass spectrometry based on synchrotron radiation for the first time. The photoionization efficiency curves of the corresponding gaseous products as well as the chosen standards have been deduced by gating the interested peaks in the photoionization mass spectra while scanning the photon energy simultaneously, which permits the identification of the pivotal gaseous products of the photooxidation of isoprene, such as formaldehyde (10.84 eV), formic acid (11.38 eV), acetone (9.68 eV), glyoxal (9.84 eV), acetic acid (10.75 eV), methacrolein (9.91 eV), and methyl vinyl ketone (9.66 eV). Proposed reaction mechanisms leading to the formation of these key products were discussed, which were completely consistent with the previous works of different groups. The capability of synchrotron radiation photoionization mass spectrometry to directly identify the chemical composition of the gaseous products in a simulation chamber has been demonstrated, and its potential application in related studies of atmospheric oxidation of ambient volatile organic compounds is anticipated"
Keywords:		Butadienes/*chemistry/radiation effects Hemiterpenes/*chemistry/radiation effects Mass Spectrometry Oxidation-Reduction Pentanes/*chemistry/radiation effects Synchrotrons;
Notes:		"MedlinePan, Gang Hu, Changjin Huang, Mingqiang Wang, Zhenya Cheng, Yue Liu, Zhi Gu, Xuejun Zhao, Weixiong Zhang, Weijun Chen, Jun Liu, Fuyi Shan, Xiaobin Sheng, Liusi eng Research Support, Non-U.S. Gov't Netherlands 2012/01/01 J Environ Sci (China). 2012; 24(12):2075-82. doi: 10.1016/s1001-0742(11)61051-6"