Acta Phys. -Chim. Sin. ›› 2006, Vol. 22 ›› Issue (05): 596-601.doi: 10.3866/PKU.WHXB20060516

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Chemical Composition and Reaction Mechanisms for Secondary Organic Aerosol from Photooxidation of Ethylbenzene

HUANG Ming-Qiang;HAO Li-Qing;ZHOU Liu-Zhou;GU Xue-Jun;WANG Zhen-Ya;FANG Li;ZHANG Wei-Jun   

  1. Laboratory of Environment Spectroscopy, Anhui Institute of Optics&Fine Mechanics,Chinese Academy of Sciences, Hefei 230031, P. R. China
  • Received:2005-11-24 Revised:2006-01-17 Published:2006-04-28
  • Contact: ZHANG, Wei-Jun E-mail:wjzhang@aiofm.ac.cn

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Abstract: A laboratory study was carried out to investigate the secondary organic aerosol (SOA) products from photooxidation of the aromatic hydrocarbon ethylbenzene. The experiments were conducted by irradiating ethylbenzene/CH3ONO/NOx mixtures in a home-made smog chamber. Size distribution of the secondary organic aerosol particles was detected with an aerodynamic particle sizer spectrometer. The aerosol time-of-flight mass spectrometer (ATOFMS) was used to measure the chemical composition of individual secondary organic aerosol particle in real time. According to a large number of single aerosol mass spectra, the chemical composition of SOA was obtained statistically. The possible reaction mechanisms leading to these products were also discussed.

Key words: Ethylbenzene, Secondary organic aerosol, Smog chamber, Laser desorption/ ionization, Reaction mechanisms