Model aerosols were generated from the individual hydrocarbons, pinenes, toluene and 1-heptene, by irradiation under simulated atmospheric conditions in the presence of NOx, or NOx/SO2. The reactions were carried out in a 17.3 cu m environmental chamber. The collected aerosols were subjected to analysis by mass spectrometry and chromatographic techniques, both with and without chemical derivatization. Polyfunctional oxidation products, including quinones and carboxylic acid, were tentatively identified in the toluene aerosol. The 1-heptene filtered aerosol was shown to contain condensation products from different 1-heptene molecules. Tentative identification of a number of vapor-phase species was accomplished in both systems. The health effects of the atmospheric oxidation products from hydrocarbons is discussed.

Project Officer: Ronald K. Patterson, Atmospheric Chemistry and Physics Division. Prepared for United States Environmental Protection Agency, Office of Research and Development, Environmental Sciences Research Laboratory by Batelle Memorial Institute under Grant Number 801174. "July 1976." Includes bibliographical references (p. 53).