HR: 1340h
AN: A53C-0911    [Abstracts]
TI: Measurement of the Henry's Law Coefficient and the Solvolysis Rate of PAN in n-Octanol
AU: * Roberts, J M
EM: James.M.Roberts@noaa.gov
AF: NOAA/ERL Aeronomy Laboratory, RAL7 325 Broadway, Boulder, CO 80305 United States
AB: Peroxyacetic Nitric Anhydride (PAN) is one of the most abundant odd-nitrogen species in the atmosphere in part because of it's low solubility in water. Much less is known about the solubility of PAN in non-polar media that are characteristic of some plant materials or aerosol particles. n-Octanol is often used as a surrogate for non-polar media in the determination of the environmental fate of pollutants. The solubility of PAN in n-octanol was measured over a temperature range of 273 to 298K, using a bubble column flow system with GC/ECD detection. The observed Henry's Law coefficients ranged from 26 to 90 M/atm and the first order solvolysis rate constants were quite low, less than 5 x10$^{-5}$ sec$^{-1}$. The implications of these findings for the heterogeneous transport and loss of PAN will be discussed.
DE: 0317 Chemical kinetic and photochemical properties
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting