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| Titel |
Identification and quantification of gaseous organic compounds emitted from biomass burning using two-dimensional gas chromatography–time-of-flight mass spectrometry |
| VerfasserIn |
L. E. Hatch, W. Luo, J. F. Pankow, R. J. Yokelson, C. E. Stockwell, K. C. Barsanti |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 15, no. 4 ; Nr. 15, no. 4 (2015-02-23), S.1865-1899 |
| Datensatznummer |
250119449
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| Publikation (Nr.) |
 copernicus.org/acp-15-1865-2015.pdf |
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| Zusammenfassung |
| The current understanding of secondary organic aerosol (SOA) formation
within biomass burning (BB) plumes is limited by the incomplete
identification and quantification of the non-methane organic compounds
(NMOCs) emitted from such fires. Gaseous organic compounds were collected on
sorbent cartridges during laboratory burns as part of the fourth Fire Lab at
Missoula Experiment (FLAME-4) and analyzed by two-dimensional gas
chromatography–time-of-flight mass spectrometry (GC × GC–ToFMS). The
sensitivity and resolving power of GC × GC–ToFMS allowed the
acquisition of the most extensive data set of BB NMOCs to date, with
measurements for 708 positively or tentatively identified compounds.
Estimated emission factors (EFs) are presented for these compounds for burns
of six different vegetative fuels, including conifer branches, grasses,
agricultural residue, and peat. The number of compounds meeting the peak
selection criteria ranged from 129 to 474 among individual burns, and
included extensive isomer groups. For example, 38 monoterpene isomers were
observed in the emissions from coniferous fuels; the isomeric ratios were
found to be consistent with those reported in relevant essential oils,
suggesting that the composition of such oils may be very useful when
predicting fuel-dependent terpene emissions. Further, 11 sesquiterpenes
were detected and tentatively identified, providing the first reported
speciation of sesquiterpenes in gas-phase BB emissions. The calculated EFs
for all measured compounds
are compared and discussed in the context of
potential SOA formation. |
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