Actions for A MEASUREMENT TECHNIQUE FOR HYDROXYACETONE [electronic resource].

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A MEASUREMENT TECHNIQUE FOR HYDROXYACETONE [electronic resource].

Published
Riverside, Calif. : University of California, Riverside, 1999.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
7 pages : digital, PDF file
Additional Creators
Brookhaven National Laboratory, University of California, Riverside, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Hydroxyacetone (HA) is mainly produced in the atmosphere from oxidation of hydrocarbons of the type, CH₃(R)C=CH₂. Tuazon and Atkinson (1990) reported HA yield of 41% from the OH-initiated oxidation of methacrolein in the presence of NOₓ. Since methacrolein is a major product of isoprene oxidation (Carter and Atkinson, 1996), isoprene, a key biogenic hydrocarbon, is therefore expected to be an important source for HA. Consequently, knowledge of ambient concentration of HA would provide information needed to examine the applicability of isoprene reaction mechanisms developed in laboratory and to assess the contribution of isoprene to photooxidant production. The commonly used GC-FID technique involving cryo-focusing is unsuitable for HA owing to HA's thermal instability. When subjected to a temperature of 100 C for only a few seconds, HA was found to disappear completely. Since HA is highly soluble in water (it's Henry's law constant being ≈2 x 10⁴ M atm⁻¹ at 20 C, Zhou and Lee, unpublished data), we developed a wet chemical technique similar in principle to the one we reported earlier (Lee and Zhou, 1993), namely, based on derivatization following liquid scrubbing. To increase the sensitivity, we adopted a fluorescence detection scheme based on o-phthaldialdehyde (OPA) chemistry. The technique was deployed in the field during two measurement periods at a NARSTO site located on Long Island (LI), New York. We report the principle and the operation of this technique and the results obtained from these field studies.
Report Numbers
E 1.99:bnl--66932
bnl--66932
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Note
Published through SciTech Connect.
10/04/1999.
"bnl--66932"
"KP12020201"
COMBINED U.S./GERMAN OZONE/FINE PARTICLE SCIENCE AND ENVIRONMENTAL CHAMBER WORKSHOP, MISSION INN, RIVERSIDE, CA (US), 10/04/1999--10/06/1999.
KLOTZ,P.J.
Funding Information
AC02-98CH10886
AS025ECD
View MARC record | catkey: 14136650