Identification

Title

ICARUS Chamber Experiment: 2014 FIXCIT Study_20140121_ISOPRENE/hydrogen peroxide_Hydroxyl radical_No Seed_Isoprene + OH, low NO, dry, no seeds, lower initial concentration

Abstract

Goals: Study isoprene low NO chemistry. The experiment will be similar to the experiment run on 01/02/2014, but the loading will be lower, so as to limit RO2 + RO2 chemistry. Summary: We injected isoprene initially and like the experiment run on 01/19/2014 there was ISOPOOH contamination during the injection. We decided given the goals of the experiment to flush the bag for several hours to remove the ISOPOOH. After several hours of flushing the ISOPOOH was roughly around 200 ppt (see the worked up data for a more precise number). The source of contamination was found, and everything was cleaned again. No ISOPOOH was injected during the second injection of isoprene. Because we started the experiment later (i.e., after rush hour), the NO background was a lot lower than previous experiments (~10 ppt in the beginning). The lower isoprene loading in this experiment allowed for the HO2 pathway to dominate over the RO2 pathway and allowed for later generation products to form. During the experiment we saw ISOPOOH form and decay away. Unexpectedly IEPOX also formed and decayed away. There seemed to be a lower than expected amount of IEPOX formed. Perhaps wall loss was greater in this experiment than on 01/02/2014. For the PTR-MS and GC-FID, we trapped ISOPOOH/IEPOX at -40 deg C, so that yields of MVK and MACR for the experiment could be determined without the ISOPOOH/IEPOX interference. Organization: 2014 FIXCIT Study Lab Affiliation: California Institute of Technology Chamber: Seinfeld chambers Experiment Category: Gas phase chemical reaction Oxidant: Hydroxyl radical Reactants: ISOPRENE, hydrogen peroxide Reaction Type: Photooxidation Relative Humidity: 5 Temperature: 27 Pressure: 750 Torr

Resource type

dataset

Resource locator

https://gdex.ucar.edu/dataset/id/a62b79f7-b70c-4489-869c-5124e1223c87.html

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applicationProfile: browser

name: ICARUS Chamber Experiment: 2014 FIXCIT Study_20140121_ISOPRENE/hydrogen peroxide_Hydroxyl radical_No Seed_Isoprene + OH, low NO, dry, no seeds, lower initial concentration

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Unique resource identifier

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codeSpace

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Topic category

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Dataset

originating controlled vocabulary

title

reference date

date type

revision

effective date

2014-10-16

Keyword set

keyword value

EARTH SCIENCE > ATMOSPHERE > AEROSOLS

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > TRACE GASES/TRACE SPECIES

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title

reference date

date type

revision

effective date

2018-03-15

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Other > Physical Models > Laboratory > Laboratory

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title

reference date

date type

revision

effective date

2018-03-15

Keyword set

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In Situ/Laboratory Instruments > Chemical Meters/Analyzers

originating controlled vocabulary

title

reference date

date type

revision

effective date

2018-03-15

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Temporal reference

Temporal extent

Begin position

2014-01-21

End position

2014-01-21

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publication

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2021-10-12

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modified

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2021-10-12

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Compressed Archive File (application/zip)

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Creative Commons Attribution 4.0 International License.

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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.

Responsible organisations

Responsible party

organisation name

2014 FIXCIT Study

email address

tbn@ucdavis.edu

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

organisation name

UCAR/NCAR - GDEX

email address

datahelp@ucar.edu

responsible party role

pointOfContact

Metadata date

2022-01-27T09:12:22-07:00

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