TY - JOUR
T1 - Carbon kinetic isotope effects in the gas-phase reactions of aromatic hydrocarbons wih the OH radical at 296 ± 4 K
AU - Anderson, Rebecca S.
AU - Iannone, Richard
AU - Thompson, Alexandra E.
AU - Rudolph, Jochen
AU - Huang, Lin
PY - 2004/8/16
Y1 - 2004/8/16
N2 - The carbon kinetic isotope effects (KIEs) of the room temperature reactions of benzene and several light alkyl benzenes with OH radicals were studied in a reaction chamber at ambient pressure using gas chromatography coupled with online combustion and isotope ratio mass spectrometry (GCC-IRMS). The KIEs are reported in per mil according to ε (‰) = (KIE - 1) × 1000, where KIE = k12 /k13. The following average KIEs were obtained, (all in ‰): benzene 7.53 ± 0.50; toluene 5.95 ± 0.28; ethylbenzene 4.34 ± 0.28; o-xylene 4.27 ± 0.05, p-xylene 4.83 ± 0.81; o-ethyltoluene 4.71 ± 0.12 and 1,2,4-trimethylbenzene 3.18 ± 0.09. Our KIE value for benzene + OH agrees with the only reported value known to us [Rudolph et al., 2000]. It is shown that measurements of the stable carbon isotope ratios of light aromatic compounds should be extremely useful to study atmospheric processing by the OH radical.
AB - The carbon kinetic isotope effects (KIEs) of the room temperature reactions of benzene and several light alkyl benzenes with OH radicals were studied in a reaction chamber at ambient pressure using gas chromatography coupled with online combustion and isotope ratio mass spectrometry (GCC-IRMS). The KIEs are reported in per mil according to ε (‰) = (KIE - 1) × 1000, where KIE = k12 /k13. The following average KIEs were obtained, (all in ‰): benzene 7.53 ± 0.50; toluene 5.95 ± 0.28; ethylbenzene 4.34 ± 0.28; o-xylene 4.27 ± 0.05, p-xylene 4.83 ± 0.81; o-ethyltoluene 4.71 ± 0.12 and 1,2,4-trimethylbenzene 3.18 ± 0.09. Our KIE value for benzene + OH agrees with the only reported value known to us [Rudolph et al., 2000]. It is shown that measurements of the stable carbon isotope ratios of light aromatic compounds should be extremely useful to study atmospheric processing by the OH radical.
UR - https://www.scopus.com/pages/publications/7044235913
U2 - 10.1029/2004GL020089
DO - 10.1029/2004GL020089
M3 - Article
AN - SCOPUS:7044235913
SN - 0094-8276
VL - 31
SP - L15108 1-4
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 15
ER -