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Title: Quantitative infrared absorption cross-sections of isoprene for atmospheric measurements

Isoprene (C 5H 8, 2-methyl-1,3-butadiene) is a volatile organic compound (VOC) that is one of the primary contributors to annual global VOC emissions. Produced by vegetation as well as anthropogenic sources, the OH- and O 3-initiated oxidations of isoprene are a major source of atmospheric oxygenated organics. Few quantitative infrared studies have been reported for isoprene, however, limiting the ability to quantify isoprene emissions via stand-off infrared or in situ detection. We thus report absorption coefficients and integrated band intensities for isoprene in the 600–6500 cm −1 region. The pressure-broadened (1 atmosphere N 2) spectra were recorded at 278, 298 and 323 K in a 19.94 cm path length cell at 0.112 cm −1 resolution, using a Bruker 66v FTIR. Composite spectra are derived from a minimum of seven isoprene sample pressures at each temperature and the number densities are normalized to 296 K and 1 atmosphere.
Authors:
; ; ; ;
Publication Date:
Grant/Contract Number:
AC05-76RLO 1830
Type:
Published Article
Journal Name:
Atmospheric Measurement Techniques Discussions (Online)
Additional Journal Information:
Journal Name: Atmospheric Measurement Techniques Discussions (Online); Journal Volume: 7; Journal Issue: 4; Journal ID: ISSN 1867-8610
Publisher:
European Geosciences Union
Sponsoring Org:
USDOE
Country of Publication:
Germany
Language:
English
OSTI Identifier:
1198478

Brauer, C. S., Blake, T. A., Guenther, A. B., Sams, R. L., and Johnson, T. J.. Quantitative infrared absorption cross-sections of isoprene for atmospheric measurements. Germany: N. p., Web. doi:10.5194/amtd-7-4163-2014.
Brauer, C. S., Blake, T. A., Guenther, A. B., Sams, R. L., & Johnson, T. J.. Quantitative infrared absorption cross-sections of isoprene for atmospheric measurements. Germany. doi:10.5194/amtd-7-4163-2014.
Brauer, C. S., Blake, T. A., Guenther, A. B., Sams, R. L., and Johnson, T. J.. 2014. "Quantitative infrared absorption cross-sections of isoprene for atmospheric measurements". Germany. doi:10.5194/amtd-7-4163-2014.
@article{osti_1198478,
title = {Quantitative infrared absorption cross-sections of isoprene for atmospheric measurements},
author = {Brauer, C. S. and Blake, T. A. and Guenther, A. B. and Sams, R. L. and Johnson, T. J.},
abstractNote = {Isoprene (C5H8, 2-methyl-1,3-butadiene) is a volatile organic compound (VOC) that is one of the primary contributors to annual global VOC emissions. Produced by vegetation as well as anthropogenic sources, the OH- and O3-initiated oxidations of isoprene are a major source of atmospheric oxygenated organics. Few quantitative infrared studies have been reported for isoprene, however, limiting the ability to quantify isoprene emissions via stand-off infrared or in situ detection. 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 19.94 cm path length cell at 0.112 cm−1 resolution, using a Bruker 66v FTIR. Composite spectra are derived from a minimum of seven isoprene sample pressures at each temperature and the number densities are normalized to 296 K and 1 atmosphere.},
doi = {10.5194/amtd-7-4163-2014},
journal = {Atmospheric Measurement Techniques Discussions (Online)},
number = 4,
volume = 7,
place = {Germany},
year = {2014},
month = {4}
}