A typical petrochemical industrial area was selected as the research object, and particulate phase and gas phase samples of intermediate-volatility organic compounds (IVOCs) were collected in the air of the plant area in summer (July and August in 2021) to explore the pollution characteristics of IVOCs emission from petrochemical industrial sources and estimate their corresponding SOA (secondary organic aerosols) formation potential. The results show that, 1) the average concentration of IVOCs particle phase in typical petrochemical area is 4.22±1.54 μg/m³, and the average concentration of IVOCs gas phase is 108.87±78.93 μg/m³. The average concentration of IVOCs during the day is higher than that at night both in the gas phase and in the particle phase. 2) The n-alkanes in gas phase are concentrated from C₁₂ to C₂₂, while the n-alkanes in particle phase are concentrated from C₂₂ to C₃₅. The gas phase of polycyclic aromatic hydrocarbons is concentrated in naphthalene and phenanthrene, and the particle phase is concentrated in fluorene. 3) The IVOCs in the petrochemical industrial zone are quantitatively disassembled. The concentration is mainly concentrated in the interval B₁₈–B₂₁. The mass concentration sum of these four zones accounts for 60.41% of the total mass of IVOCs.

intermediate-volatility organic compounds (IVOCs), petrochemical industrial zone, emission concentration characteristics, secondary organic aerosol (SOA)