Effect of acidity on secondary organic aerosol formation from isoprene.
作者： Jason D. Surratt , Michael Lewandowski , John H. Offenberg , Mohammed Jaoui , Tadeusz E. Kleindienst
DOI: 10.1021/ES0704176
关键词: Organosulfate 、 Volatile organic compound 、 Environmental chemistry 、 Mass concentration (chemistry) 、 Chemistry 、 Aerosol 、 Terpenoid 、 Hydrocarbon 、 Sulfate 、 Inorganic chemistry 、 Isoprene
摘要: The effect of particle-phase acidity on secondary organic aerosol (SOA) formation from isoprene is investigated in a laboratory chamber study, which the inorganic seed was controlled systematically. observed enhancement SOA mass concentration closely correlated to increasing (R2 = 0.979). Direct chemical evidence for acid-catalyzed reactions obtained analyses. Aerosol concentrations 2-methyltetrols, as well newly identified sulfate esters, both serve tracers ambient aerosols, increased significantly with enhanced acidity. acidities, measured nmol H+ m-3, employed present study are same range those tropospheric collected eastern U.S.
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