Citation:

Forstner, H. J., R. C. Flagan, AND J. H. Seinfeld. MOLECULAR SPECIATION OF SECONDARY ORGANIC AEROSOL FROM PHOTOOXIDATION OF THE HIGHER ALKENES: 1-OCTENE AND 1-DECENE. (R824970). ATMOSPHERIC ENVIRONMENT. American Chemical Society, Washington, DC, 31(15):1953-1964, (1997).

Description:

Outdoor smog chamber photooxidations to determine the molecular composition of secondary organic aerosol (SOA) from 1-octene and 1-decene in sunlight-irradiated hydrocarbon-NO_x mixtures are reported. The observed products are consistent with the current understanding of alkene reactions with OH and O₃. Gas-phase mechanisms leading to the observed products are outlined. Heptanal, heptanoic acid, and dihydro-5-propyl-2(3H)-furanone were the dominant organics identified in 1-octene aerosol. The corresponding species in 1-decene aerosol were nonanal, nonanoic acid, and dihydro-5-pentyl-2(3H)-furanone. Measured aerosol yields from 1-octene and 1-decene experiments are also reported, and are found to correlate with organic mass concentration according to semi-volatile gas/particle partitioning theory. A new organic aerosol extraction procedure utilizing supercritical CO₂ extraction is outlined.

Author Keywords: Secondary organic aerosol; aerosol yield; SOA composition; alkene photooxidation; supercritical CO₂ extraction

Record Details:

Record Type:DOCUMENT( JOURNAL/ PEER REVIEWED JOURNAL)

Product Published Date:01/01/1997

Record Last Revised:12/22/2005

Record ID: 70522

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Document IDs:

EPA Number :R824970