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:

  • Kong, Stephanie
    Caltech Atmospheric Chamber

Temporal Range

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


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

Publication : Organic aerosol formation from the reactive uptake of isoprene epoxydiols (IEPOX) onto non-acidified inorganic seeds

Additional Information N/A
Resource Format Compressed Archive File (application/zip)
Standardized Resource Format Archive
Asset Size N/A
Legal Constraints

Creative Commons Attribution 4.0 International License.

Access Constraints These data are openly accessible by all registered users. Accounts are available free of charge following the registration of user information with a valid email address.
Software Implementation Language N/A

Resource Support Name Kong, Stephanie
Resource Support Email wkong@caltech.edu
Resource Support Organization Caltech Atmospheric Chamber
Distributor N/A
Metadata Contact Name GDEX Curator
Metadata Contact Email gdex@ucar.edu
Metadata Contact Organization UCAR/NCAR - GDEX

Author Seinfeld, John
Publisher ICARUS Community
Publication Date 2023-08-23
Digital Object Identifier (DOI) https://doi.org/10.5065/wzcd-nr42
Alternate Identifier N/A
Resource Version N/A
Topic Category N/A
Progress N/A
Metadata Date 2023-08-23T02:26:06-06:00
Metadata Record Identifier edu.ucar.gdex::12013cd8-3bb0-42ec-b961-63bb8ab1bdca
Metadata Language eng; USA
Suggested Citation Seinfeld, John. (2023). ICARUS Chamber Experiment: Caltech Atmospheric Chamber_20130415_trans-beta IEPOX/hydrogen peroxide_Hydroxyl radical_Ammonium sulfate_AqueousPhotooxidation. ICARUS Community. https://doi.org/10.5065/wzcd-nr42. Accessed 04 October 2023.

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