TY  - JOUR
AU  - Poppe, D.
AU  - Brauers, T.
AU  - Dorn, H.-P.
AU  - Karl, M.
AU  - Mentel, T.
AU  - Schlosser, E.
AU  - Tillmann, R.
AU  - Wegener, R.
AU  - Wahner, A.
TI  - OH-initiated degradation of several hydrocarbons in the atmosphere simulation chamber SAPHIR
JO  - Journal of atmospheric chemistry
VL  - 57
SN  - 0167-7764
CY  - Dordrecht [u.a.]
PB  - Springer Science + Business Media B.V
M1  - PreJuSER-57544
SP  - 203 - 214
PY  - 2007
N1  - Record converted from VDB: 12.11.2012
AB  - Degradation of isoprene, m-xylene, n-octane, propene, and methacrolein by hydroxyl radicals has been studied in the simulation chamber SAPHIR under burden of trace gases as they are typical for the moderately polluted planetary boundary layer. Measured time series of the hydrocarbon mixing ratios and the OH concentrations were used to determine the rate constants. The hydrocarbons were measured with gas chromatography and proton transfer reaction mass spectrometry. OH was measured with the Julich DOAS (differential optical absorption spectroscopy) instrument. In all cases except methacrolein good agreement was found with the reference rate constants taken from theMaster Chemical Mechanism ( MCM3.1). The data for methacrolein are consistent with the results of Karl et al. ( J. Atmos. Chem 55, 2006, doi:10.1007/s10874-006-9034-x) who reported a 12% smaller value. The degradation of hydrocarbons provides an independent method to analyse precision and accuracy of the OH measurements. A precision of better than 4% over a period of nearly 4 months was found. The accuracy is within the limitations given by the light absorption cross section of OH. Both results are consistent with earlier results by Hausmann et al.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000248002200001
DO  - DOI:10.1007/s10874-007-9065-y
UR  - https://juser.fz-juelich.de/record/57544
ER  -