In order to analyze the chemical characteristics and impact analysis of ozone or secondary organic aero-sol formation of VOCs in the northeast area of Yixing,atmospheric Volatile Organic Compounds(VOCs)were continuously monitored via an online GC～FID/MS system during the autumn of 2022.During the sampling peri-od,the top 10 average concentration of atmospheric VOCs was toluene,meta-xylene/para-xylene,dichloromethane,acetone,ethyl acetate,1,2-dichloroethane,ethane,methyl chloride,ethylene and acetylene successively.In the top 10 ozone formation potential of VOCs,aromatic hydrocarbons OFPs contribution proportion(73.37％)＞olefin OFPs contribution proportion(19.24％)＞oxygenated volatile organic compounds OFPs contribution proportion(7.39％).The top 10 species with the highest contribution of Secondary Organic Aerosol(SOA)generation poten-tial of autumn VOCs in the northeast of Yixing were all aromatic hydrocarbons.According to the analysis meth-ods of correlation ratio of typical VOCs,benzene and toluene were mainly from industrial and solvent emissions.Propylene was mainly from industrial emissions.Isopentane and n-pentane were mainly from petroleum and natu-ral gas emissions in the area.
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