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Data · dataset · 2026

ICARUS Chamber Experiment: Caltech Atmospheric Chamber_20140724_Methacrylolyl peroxynitrate (MPAN)/ALPHA-PINENE/hydrogen peroxide/Methacrylic acid epoxide (MAE)_Hydroxyl radical_No Seed_Dry

Listed in National Center for Atmospheric Research

Goals: This experiment was done to photooxidize MPAN and capture NO3 with a-pinene, while observing secondary organic aerosol (SOA) formation through dry nucleation.

Description

MAE was added toward the end of the experiment to see if it enhanced SOA formation.

Summary

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Addition of MAE didn't change the particle mass. Similar to 7/22 - we observed m/z 316, the pinene nitroxyhydroperoxide on CIMS, which showed that NO3 radical was liberated from the MPAN + OH reaction. This reaction produced a lot of SOA.

Organization: Caltech Atmospheric Chamber Lab Affiliation: California Institute of Technology, Pasadena, CA Chamber: Near/Far Bag 2012-2015 (Tran) Experiment Category: Gas phase chemical reaction, Aerosol formation Oxidant: Hydroxyl radical Reactants: Methacrylolyl peroxynitrate (MPAN), ALPHA-PINENE, hydrogen peroxide, Methacrylic acid epoxide (MAE) Reaction Type: Photooxidation Relative Humidity: 4 Temperature: 15 Pressure: 750 Torr

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Organic chemistry 69%
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