采用环境烟雾箱模拟实验，在近大气条件下研究了α?蒎烯气相臭氧氧化反应。通过气体与气溶胶膜采样进样口FIGAERO（ Filter Inlet for Gas and AEROsols）与高分辨率飞行时间化学电离质谱（ HRToF?CIMS）联用对颗粒相产物进行了鉴别，鉴别结果表明，颗粒相产物中浓度最高的是蒎酮醛，其它主要产物包括蒎酮酸、蒎醛酸、降蒎酮酸、降蒎醛酸和蒎酸。采用扫描电迁移率粒径谱仪（ SMPS）、气溶胶质量分析仪（ APM）与云凝结核计数器（ CCNC）联用考察了臭氧氧化反应生成的二次有机气溶胶（ SOA）的粒径谱分布、密度、产率以及云凝结核活性发现，随着臭氧氧化反应的进行，SOA的密度、质量浓度以及云凝结核活性均呈上升趋势。同时研究了重要的大气物种SO2对α?蒎烯臭氧氧化反应的影响，实验结果表明，SO2能大大促进气溶胶成核，气溶胶数浓度、质量浓度和产率均提高，同时云凝结核活性也显著增强，其可能的机制是反应中稳定化的Criegee中间体与SO2反应生成硫酸。
Gas?phase ozonolysis of α?pinene was studied in smog chamber experiments under near atmospheric conditions. Particle phase products were identified using Filter Inlet for Gas and AEROsols ( FIGAERO ) coupled to High?resolution Time of Flight Chemical Ionization Mass Spectrometry ( HRToF?CIMS ) . SOA size distribution, density, mass yield and CCN activity were monitored by a combination of Scanning Mobility Particle Sizer ( SMPS) , Aerosol Particle Analyzer ( APM ) and Cloud Condensation Nuclei Counter ( CCNC ) . Furthermore, the effect of atmospherically important SO2 on the ozonolysis system was investigated.
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