ICARUS Chamber Experiment: Nguyen Group_20190425_ALPHA-PINENE/hydrogen peroxide/OZONE/10102-44-0_Nitrate radical_Ammonium sulfate

Goals: To assess the feasibility of accessing nighttime HO2 dominated chemistry of a-pinene by adding H2O2 + ozone + NO2 to the chamber. Overall goals will include quantifying the nitrooxy-hydroperoxide yield and the SOA yield from this reaction pathwaySummary: H2O2, NO2, and O3 were injected in the chamber and allowed to equilibrate, forming NO3 (and some N2O5) and probably HO2. Then a-pinene was injected and decayed by simultaneous reaction with ozone and NO3. Gas phase was monitored by CF3O- CIMS and particle formation by SMPS. A filter was collected for later offline analysis.Organization: Nguyen Group Lab Affiliation: UC Davis Chamber: Tran's big bag of airExperiment Category: Gas phase chemical reaction, Aerosol formation Oxidant: Nitrate radical Reactants: ALPHA-PINENE, hydrogen peroxide, OZONE, 10102-44-0 Reaction Type: Dark oxidation Relative Humidity: 5 Temperature: 22 Seed Name: Ammonium sulfate Pressure: 755 Torr