ICARUS Chamber Experiment: Caltech Atmospheric Chamber_20130415_trans-beta IEPOX/hydrogen peroxide_Hydroxyl radical_Ammonium sulfate_AqueousPhotooxidation

Goals: This is similar to the 130410 experiment except that H2O2 is atomized with ammonium sulfate in the particles. IEPOX was introduced to hydrated ammonium sulfate at 50% RH, the chamber was cooled to to remove the IEPOX from the gas phase (no more traces in CIMS); this increased the RH to ~80%) then lights turned on to photolyze the IEPOX on the particles. Summary: Gaseous H2O2 was not observed when the H2O2 was atomized with AS in the particle, which suggests all the reaction was in the particle phase. The organic aerosol as seen on AMS reacted nearly all away. Fragmentation products such as hydroxyacetone, glycolaldehyde, formic acid, acetic acid, and peroxyacetic acid were seen as products on CIMS Organization: Caltech Atmospheric Chamber Lab Affiliation: California Institute of Technology, Pasadena, CA Chamber: Near/Far Bag 2012-2015 (Tran) Experiment Category: Condensed-phase chemical reaction, Multiphase chemical reaction Oxidant: Hydroxyl radical Reactants: trans-beta IEPOX, hydrogen peroxide Reaction Type: Photooxidation, Heterogeneous oxidation, Other aqueous/aerosol phase Relative Humidity: 49-80 Temperature: 16-22 Seed Name: Ammonium sulfate Pressure: 750 Torr

To Access Resource:

Questions? Email Resource Support Contact:

  • datahelp@ucar.edu

Temporal Range

  • Begin:  2013-04-15
    End:  2013-04-15

Keywords

Resource Type dataset
Temporal Range Begin 2013-04-15
Temporal Range End 2013-04-15
Temporal Resolution N/A
Bounding Box North Lat N/A
Bounding Box South Lat N/A
Bounding Box West Long N/A
Bounding Box East Long N/A
Spatial Representation N/A
Spatial Resolution N/A
Related Links

Related Resource #1 : ICARUS Dataset at UC-Davis
Additional Information N/A
Resource Format ASCII
Standardized Resource Format ASCII
Asset Size 62.301 MB
Legal Constraints

Creative Commons Attribution 4.0 International License
Access Constraints None
Software Implementation Language N/A

Resource Support Name N/A
Resource Support Email datahelp@ucar.edu
Resource Support Organization N/A
Distributor NSF NCAR Geoscience Data Exchange
Metadata Contact Name N/A
Metadata Contact Email datahelp@ucar.edu
Metadata Contact Organization NSF NCAR Geoscience Data Exchange

Author Seinfeld, John H.
Publisher NSF National Center for Atmospheric Research
Publication Date 2023-08-23
Digital Object Identifier (DOI) https://doi.org/10.5065/wzcd-nr42
Alternate Identifier d789661
Resource Version N/A
Topic Category environment
Progress completed
Metadata Date 2025-10-09T01:44:29Z
Metadata Record Identifier edu.ucar.gdex::d789661
Metadata Language eng; USA
Suggested Citation Seinfeld, John H.. (2023). ICARUS Chamber Experiment: Caltech Atmospheric Chamber_20130415_trans-beta IEPOX/hydrogen peroxide_Hydroxyl radical_Ammonium sulfate_AqueousPhotooxidation. NSF National Center for Atmospheric Research. https://doi.org/10.5065/wzcd-nr42. Accessed 10 October 2025.

Harvest Source