ICARUS Chamber Experiment: 2014 FIXCIT Study_20140103_ISOPRENE/nitric oxide/hydrogen peroxide_Hydroxyl radical_No Seed_Isoprene + OH, high NO, dry, no seeds

d789042
| DOI: 10.5065/S7BM-R313
 
Ask a Question
Abstract:

Goals:
High NO isoprene oxidation experiment. Interested mainly in working out chamber method for high-NOx condition with this many instruments.

Summary:
Isoprene injection was conducted as the first step in the consideration of OH reactivity measurement. H2O2 injection proceeded as normally. 4.5 minutes NO injection was conducted to obtain 500 ppb NO level in the chamber. After approximately 30-45 minutes of sampling, instruments reported stable backgrounds so the UV lights were turned on. We have 50% lights on for the high-NOx conditions to slow down the isoprene decay. The bag was not very puffy when instruments started to sample for the background before lights on. For future runs, it might be better to fill the bag before background sampling started. This means the initial concentrations of all the precursors should be ~15% higher than the final desired values. I/A CIMS detected a signal at m/z 90 and they confirmed that this signal is oxalic acid. This might be resulted from the last experiment we did with HCHO injection involved.

Organization: 2014 FIXCIT Study
Lab Affiliation: California Institute of Technology
Chamber: Seinfeld chambers

Experiment Category: Gas phase chemical reaction
Oxidant: Hydroxyl radical
Reactants: ISOPRENE, nitric oxide, hydrogen peroxide
Reaction Type: Photooxidation
Relative Humidity: 5
Temperature: 26
Pressure: 750 Torr

Temporal Range:
2014-01-03
Variables:
Trace Gases/Trace Species
Data Types:
Platform Observation
Data Contributors:
CALTECH/GPS
Division of Geological and Planetary Sciences, California Institute of Technology
 |  UC-DAVIS/CHEMISTRY
Department of Chemistry, University of California, Davis
Related Resources:
ICARUS Dataset at UC-Davis
Total Volume:
1.67 MB
Data Formats:
ASCII (see dataset documentation)
Metadata Record:
Data License:
Data LicenseThis work is licensed under a Creative Commons Attribution 4.0 International License.
Citation counts are compiled through information provided by publicly-accessible APIs according to the guidelines developed through the https://makedatacount.org/ project. If journals do not provide citation information to these publicly-accessible services, then this citation information will not be included in RDA citation counts. Additionally citations that include dataset DOIs are the only types included in these counts, so legacy citations without DOIs, references found in publication acknowledgements, or references to a related publication that describes a dataset will not be included in these counts.