Quantitative infrared absorption cross sections of isoprene for atmospheric measurements

Journal Article · Wed Nov 19 00:00:00 EST 2014 · Atmospheric Measurement Techniques

DOI:https://doi.org/10.5194/amt-7-3839-2014· OSTI ID:1166822

Brauer, Carolyn S. ^[1]; Blake, Thomas A. ^[1]; Guenther, Alex B. ^[1]; Sharpe, Steven W. ^[1]; Sams, Robert L. ^[1]; Johnson, Timothy J. ^[1]

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1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

The OH- and O₃- initiated oxidations of isoprene, which is one of the primary volatile organic compounds produced by vegetation, are a major source of atmospheric formaldehyde and other oxygenated organics, yet little quantitative IR data exists for isoprene. We thus report absorption coefficients and integrated band intensities for isoprene in the 600 - 6500 cm^-1 region. The pressure-broadened (1 atmosphere N₂) spectra were recorded at 278, 298 and 323 K in a 19.96 cm path length cell at 0.112 cm^-1 resolution, using a Bruker 66V FTIR. Composite spectra are derived from a minimum of seven pressures at each temperature.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1166822
• Report Number(s): PNNL-SA-101735; 400403209
• Journal Information: Atmospheric Measurement Techniques, Vol. 7, Issue 11; ISSN 1867-1381
• Publisher: European Geosciences Union
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES