Hydroxynitrates are intermediates generated in both the OH and NO3 initiated oxidation of isoprene. Laboratory measurements suggest that the subsequent reactions of these compounds may be responsible for a significant amount of the secondary organic aerosol (SOA) generated in the NO3 + isoprene reaction. In this work, samples of isoprene hydroxynitrates were synthesized and their chemistry was studied in a photochemical reactor, with analysis by long path FTIR and GC-FID. The rate coefficients for the reactions of isoprene hydroxynitrates with OH, Cl, NO3 and ozone were investigated using the relative rate technique. Yields of selected products from these reactions were also measured. Implications of these measurements for the atmospheric chemistry of isoprene will be discussed.

Laboratory studies of the atmospheric chemistry of isoprene hydroxynitrate

243rd National Meeting (2012)

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