Evolved gas analysis of secondary organic aerosols
- DGA, Inc., Ventura, CA (United States)
- Lawrence Berkeley Lab., CA (United States)
Secondary organic aerosols have been characterized by evolved gas analysis (EGA). Hydrocarbons selected as aerosol precursors were representative of anthropogenic emissions (cyclohexene, cyclopentene, 1-decene and 1-dodecene, n-dodecane, o-xylene, and 1,3,5-trimethylbenzene) and of biogenic emissions (the terpenes [alpha]-pinene, [beta]-pinene and d-limonene and the sesquiterpene trans-caryophyllene). Also analyzed by EGA were samples of secondary, primary (highway tunnel), and ambient (urban) aerosols before and after exposure to ozone and other photochemical oxidants. The major features of the EGA thermograms (amount of CO[sub 2] evolved as a function of temperature) are described. The usefulness and limitations of EGA data for source apportionment of atmospheric particulate carbon are briefly discussed. 28 refs., 7 figs., 4 tabs.
- OSTI ID:
- 7070173
- Journal Information:
- Aerosol Science and Technology; (United States), Vol. 21:4; ISSN 0278-6826
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
AEROSOLS
SYNTHESIS
HYDROCARBONS
CHEMICAL REACTIONS
PHOTOCHEMICAL REACTIONS
NITRIC OXIDE
OZONE
AIR POLLUTION
ALKENES
CARBOXYLIC ACIDS
CHEMICAL ANALYSIS
COMPILED DATA
CYCLOALKENES
DODECANE
MESITYLENE
TERPENES
URBAN AREAS
XYLENES
ALKANES
ALKYLATED AROMATICS
AROMATICS
CHALCOGENIDES
COLLOIDS
DATA
DISPERSIONS
INFORMATION
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION
SOLS
400500* - Photochemistry
400201 - Chemical & Physicochemical Properties
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
400102 - Chemical & Spectral Procedures