In recent years,the pollution of volatile organic compounds(VOCs)is increasingly serious,among which biogenic volatile organic compounds(BVOCs)occupy the main position.β-ocimene is the dominant species of BVOCs.In order to explore the influencing factors of β-ocimene photochemical reaction,the mechanism of β-ocimene photochemical reaction was investigated by designing β-ocimene photochemical reaction experiment with single factor variable and multi-factor variable in this paper.The results of univariate variable experiment showed that the number of SOA particles and O3 concentration are positively correlated with the initial concentration of β-ocimene,initial con-centration of NO2 and light intensity.When[C10H16]/[NO2]is 6,it is better to improve the yield of SOA than[C10H16]/[NO2]is 1.Response surface analysis shows that the most significant photochemical reaction conditions awere light intensity 800 μW/cm2,initial concentration of β-ocimene 200 mg/m3 and initial concentration of NO2 20 mg/m3.The impact factors of β-ocimene photochemical reaction are clarified,and provides theoretical basis for at-mospheric BVOCs pollution control.
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