Acquisition of a comprhensive air quality model evaluation data set for organic compounds
- California Institute of Technology, Pasadena, CA (United States)
- DGA, Inc., Ventura, CA (United States); and others
In previous work, photochemical airshed models have been formulated and tested that are capable of predicting the concentrations of more than 50 individual vapor-phase organic compounds that are found in the urban atmosphere. In a separate development, air quality models that account for the concentration of nearly 100 particle-phase organic compounds have been tested. The opportunity thus exists to create a combined air quality model that simultaneously tracks both gas-phase, semi-volatile, and particle-phase organic compounds that range in carbon number from C1 to about C34. Such a tool can be used both to explore the relationship between source emissions and ambient air quality, and to study gas-to-particle conversion processes for organic compounds. A major barrier to the development of such a comprehensive model for atmospheric organic air pollution is the absence of an equally comprehensive atmospheric data base against which such a model can be tested. During September, 1993, an experiment designed to acquire such an air quality model validation data set for organics was conducted in Southern California. At four urban locations and at one upwind offshore island, consecutive measurements over four hour averaging limes were made of speciated vapor phase hydrocarbons, chlorinated organics, and certain gas phase oxygenates via stainless steel canister collection followed by GC/FID and GC/MS analysis. Semi-volatile organics were collected on PUF cartridges, and particle phase organics were collected by filtration, followed by GC/MS analysis. Aldehydes were collected on DNPH impregnated cartridges, and PAN`s were measured by electron capture GC. The design and selected results of that experiment will be discussed.
- OSTI ID:
- 126310
- Report Number(s):
- CONF-950402-; TRN: 95:006086-0293
- Resource Relation:
- Conference: 209. American Chemical Society (ACS) national meeting, Anaheim, CA (United States), 2-6 Apr 1995; Other Information: PBD: 1995; Related Information: Is Part Of 209th ACS national meeting; PB: 2088 p.
- Country of Publication:
- United States
- Language:
- English
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