ICARUS Chamber Experiment: Nguyen Group_20220523_alpha-Pinene/Ammonium Sulfate/Ozone/Hydrogen Peroxide_Ozone_Ammonium sulfate

Goals:
To quantify SOA yield and gas-phase product yields from humid ozonolysis of a-pinene, which will serve as a "control" experiment to subtract the ozonolysis contribution to the nighttime chemistry of a-pinene as measured in the experiment on 5/20/22.

Summary:
The chamber was humidified, after which H2O2, and O3 were injected in the chamber and allowed to equilibrate. Ammonium sulfate seed particles were injected. Then a-pinene was injected and decayed by reaction with ozone (plus some contribution from OH). Gas phase organics were monitored by CF3O- CIMS (units: normalized counts), particle formation was monitored by SMPS, and RH/T/O3/NOx were monitored throughout.

O3/NOx data sometimes require post-correction not applied here, including subtraction of an ozone interference from H2O2 (1 ppm H2O2 is detected as about 12 ppb ozone) and correction for an in-line HEPA filter (see timeline for applicable timing) that scrubs about 10% of NO2 and 45% of ozone.

CIMS ran out of reagent at about 14:30.

Organization: Nguyen Group
Lab Affiliation: UC Davis
Chamber: Tran's big bag of air

Experiment Category: Gas phase chemical reaction, Aerosol formation
Oxidant: Ozone
Reactants: alpha-Pinene, Ammonium Sulfate, Ozone, Hydrogen Peroxide
Reaction Type: Dark oxidation
Relative Humidity: 63
Temperature: 22
Seed Name: Ammonium sulfate
Pressure: approx 1 atm

DOI

https://doi.org/10.5065/7qr5-3y28

ICARUS Experiment Details

https://icarus.ucdavis.edu/experiment/871

Temporal Range

2022-05-23 to 2022-05-23

Related Links

N/A

GCMD Science Keywords

• Atmosphere > Aerosols
• Atmosphere > Atmospheric Chemistry > Trace Gases/Trace Species

GCMD Instruments

• In Situ/Laboratory Instruments > Chemical Meters/Analyzers

File Media Types

• application/zip

Support Contact

Bates, Kelvin
Nguyen Group
kelvinhbates@gmail.com

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.

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