Aug 23, 2023

ICARUS Chamber Experiment: Caltech Atmospheric Chamber_20130908_trans-beta IEPOX_None_Ammonium sulfate_DarkReactiveUptake_RH69_addedNaOH

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Version: 20230823-020134

Goals:
This experiment was performed to assess the reactive uptake behavior of trans beta-IEPOX that was synthesized for the experiment. Different particle inorganic compositions (mainly ammonium sulfate or AS) and different particle water content were investigated. Particles are injected into the chamber as deliquesced droplets (through a wet wall denuder) and they stabilize to their equilibrium particle liquid water content depending on their hygroscopicity.

Summary:
Large organic aerosol (OA) growth was observed on ammonium sulfate aerosol water where the pH was increased with NaOH. The atomizer solution was adjusted to neutral pH with NaOH, but the true pH of the particle is not known (however likely higher than without the NaOH addition).

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: None
Reactants: trans-beta IEPOX
Reaction Type: Heterogeneous oxidation, Other aqueous/aerosol phase
Relative Humidity: 69
Temperature: 22
Seed Name: Ammonium sulfate
Pressure: 750 Torr

DOI: https://doi.org/10.5065/06my-nf66

ICARUS Experiment Details: https://icarus.ucdavis.edu/experiment/608

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Temporal Range: 2013-09-08 to 2013-09-08

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

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Support Contact

Kong, Stephanie
Caltech Atmospheric Chamber
wkong@caltech.edu

Data Curator

GDEX Curator
UCAR/NCAR - GDEX
gdex@ucar.edu

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.

Full Metadata

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Authors: Seinfeld, John

Publisher

ICARUS Community

Suggested Citation: Seinfeld, John. (2023). ICARUS Chamber Experiment: Caltech Atmospheric Chamber_20130908_trans-beta IEPOX_None_Ammonium sulfate_DarkReactiveUptake_RH69_addedNaOH. Version 20230823-020134. ICARUS Community. https://doi.org/10.5065/06my-nf66. Accessed 07 Oct 2024.

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