ICARUS Chamber Experiment: 2014 FIXCIT Study_20140127_trans-beta-IEPOX/methyl nitrite_Hydroxyl radical_No Seed_Trans-beta-IEPOX + OH, moderate NO, dry, no seeds

This is similar to the wall loss observed during IEPOX experiments last summer (~7%/hour in the same bag with high levels of HNO3), which may imply that the walls are currently highly acidified. When lights were turned on, IEPOX reacted quickly; ~50% of the IEPOX remaining when lights were turned on reacted away within an hour, and a further 20% was lost in the next two hours. The CF3O- CIMS observed many of the expected oxidation products, including hydroxyacetone, glycolaldehyde, C4H8O3, C4H6O3, and C5H8O3.

Glyoxal did see an increase in signal, though they also had high noise levels. O3 reached 150 ppbv by the end of the experiment, and AMS did not see significant nucleation or aerosol growth. Organization: 2014 FIXCIT Study Lab Affiliation: California Institute of Technology Chamber: Seinfeld chambers Experiment Category: Gas phase chemical reaction Oxidant: Hydroxyl radical Reactants: trans-beta-IEPOX, methyl nitrite Reaction Type: Photooxidation Relative Humidity: 5 Temperature: 25 Pressure: 750 Torr