Accurate, direct measurements of OH yields from gas-phase ozone-alkene reactions using an in situ LIF instrument. Kroll, J., H., Hanisco, T., F., Donahue, N., M., Demerjian, K., L., & Anderson, J., G. Geophys. Res. Lett., 28:3863-3866, 2001. abstract bibtex We present direct, pressure-dependent measurements of
OH yields from gas-phase ozone-alkene reactions, using the Harvard
HOx instrument to obtain sensitive, accurate, and precise OH
concentrations. As in previous studies from our laboratory,
steady-state [OH] is measured by laser-induced fluorescence (LIF);
here, the accurate LIF calibration allows us to present absolute OH
yields for the first time. To calibrate our original LIF system, we
measure yields from ozone plus tetramethylethylene (TME) as a
function of pressure. The pressure dependence agrees with our
previous results, so our yield measurements are now of comparable
accuracy to those from indirect studies. Prompt, low-pressure
yields agree well with 1 atm yields measured over longer
timescales, confirming that much of the OH arises from
decomposition of stabilized carbonyl oxides. We also explore the
pressure dependence of yields from ethene, isobutene, and isoprene.
Yields from isobutene and isoprene are pressure-dependent,
consistent with the formation of substituted carbonyl oxides. We
observe no pressure dependence of the OH yield from ozone + ethene,
finding instead a constant yield of 14%, in line with most 1 atm
studies but in contrast with the results of another
pressure-dependent study.
C1 Harvard Univ, Dept Chem & Biol Chem, Cambridge, MA 02138 USA.
Carnegie Mellon Univ, Dept Chem, Pittsburgh, PA 15213 USA. Carnegie
Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA. SUNY Albany,
Dept Earth & Atmospher Sci, Albany, NY 12203 USA. SUNY Albany,
Atmospher Sci Res Ctr, Albany, NY 12203 USA.
@article{
title = {Accurate, direct measurements of OH yields from gas-phase ozone-alkene reactions using an in situ LIF instrument},
type = {article},
year = {2001},
pages = {3863-3866},
volume = {28},
id = {e6ca7f2f-d330-3516-aa14-bff4c7f78010},
created = {2014-10-08T16:28:18.000Z},
file_attached = {false},
profile_id = {363623ef-1990-38f1-b354-f5cdaa6548b2},
group_id = {02267cec-5558-3876-9cfc-78d056bad5b9},
last_modified = {2017-03-14T17:32:24.802Z},
read = {false},
starred = {false},
authored = {false},
confirmed = {true},
hidden = {false},
citation_key = {Kroll:GRL:2001a},
source_type = {article},
private_publication = {false},
abstract = {We present direct, pressure-dependent measurements of
OH yields from gas-phase ozone-alkene reactions, using the Harvard
HOx instrument to obtain sensitive, accurate, and precise OH
concentrations. As in previous studies from our laboratory,
steady-state [OH] is measured by laser-induced fluorescence (LIF);
here, the accurate LIF calibration allows us to present absolute OH
yields for the first time. To calibrate our original LIF system, we
measure yields from ozone plus tetramethylethylene (TME) as a
function of pressure. The pressure dependence agrees with our
previous results, so our yield measurements are now of comparable
accuracy to those from indirect studies. Prompt, low-pressure
yields agree well with 1 atm yields measured over longer
timescales, confirming that much of the OH arises from
decomposition of stabilized carbonyl oxides. We also explore the
pressure dependence of yields from ethene, isobutene, and isoprene.
Yields from isobutene and isoprene are pressure-dependent,
consistent with the formation of substituted carbonyl oxides. We
observe no pressure dependence of the OH yield from ozone + ethene,
finding instead a constant yield of 14%, in line with most 1 atm
studies but in contrast with the results of another
pressure-dependent study.
C1 Harvard Univ, Dept Chem & Biol Chem, Cambridge, MA 02138 USA.
Carnegie Mellon Univ, Dept Chem, Pittsburgh, PA 15213 USA. Carnegie
Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA. SUNY Albany,
Dept Earth & Atmospher Sci, Albany, NY 12203 USA. SUNY Albany,
Atmospher Sci Res Ctr, Albany, NY 12203 USA.},
bibtype = {article},
author = {Kroll, J H and Hanisco, T F and Donahue, N M and Demerjian, K L and Anderson, J G},
journal = {Geophys. Res. Lett.}
}
Downloads: 0
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As in previous studies from our laboratory,\nsteady-state [OH] is measured by laser-induced fluorescence (LIF);\nhere, the accurate LIF calibration allows us to present absolute OH\nyields for the first time. To calibrate our original LIF system, we\nmeasure yields from ozone plus tetramethylethylene (TME) as a\nfunction of pressure. The pressure dependence agrees with our\nprevious results, so our yield measurements are now of comparable\naccuracy to those from indirect studies. Prompt, low-pressure\nyields agree well with 1 atm yields measured over longer\ntimescales, confirming that much of the OH arises from\ndecomposition of stabilized carbonyl oxides. We also explore the\npressure dependence of yields from ethene, isobutene, and isoprene.\nYields from isobutene and isoprene are pressure-dependent,\nconsistent with the formation of substituted carbonyl oxides. We\nobserve no pressure dependence of the OH yield from ozone + ethene,\nfinding instead a constant yield of 14%, in line with most 1 atm\nstudies but in contrast with the results of another\npressure-dependent study.\nC1 Harvard Univ, Dept Chem & Biol Chem, Cambridge, MA 02138 USA.\nCarnegie Mellon Univ, Dept Chem, Pittsburgh, PA 15213 USA. Carnegie\nMellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA. SUNY Albany,\nDept Earth & Atmospher Sci, Albany, NY 12203 USA. SUNY Albany,\nAtmospher Sci Res Ctr, Albany, NY 12203 USA.","bibtype":"article","author":"Kroll, J H and Hanisco, T F and Donahue, N M and Demerjian, K L and Anderson, J G","journal":"Geophys. Res. 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As in previous studies from our laboratory,\nsteady-state [OH] is measured by laser-induced fluorescence (LIF);\nhere, the accurate LIF calibration allows us to present absolute OH\nyields for the first time. To calibrate our original LIF system, we\nmeasure yields from ozone plus tetramethylethylene (TME) as a\nfunction of pressure. The pressure dependence agrees with our\nprevious results, so our yield measurements are now of comparable\naccuracy to those from indirect studies. Prompt, low-pressure\nyields agree well with 1 atm yields measured over longer\ntimescales, confirming that much of the OH arises from\ndecomposition of stabilized carbonyl oxides. We also explore the\npressure dependence of yields from ethene, isobutene, and isoprene.\nYields from isobutene and isoprene are pressure-dependent,\nconsistent with the formation of substituted carbonyl oxides. 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