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| Titel |
A compact PTR-ToF-MS instrument for airborne measurements of volatile organic compounds at high spatiotemporal resolution |
| VerfasserIn |
M. Müller, T. Mikoviny, S. Feil, S. Haidacher, G. Hanel, E. Hartungen, A. Jordan, L. Märk, P. Mutschlechner, R. Schottkowsky, P. Sulzer, J. H. Crawford, A. Wisthaler |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 7, no. 11 ; Nr. 7, no. 11 (2014-11-17), S.3763-3772 |
| Datensatznummer |
250115949
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| Publikation (Nr.) |
 copernicus.org/amt-7-3763-2014.pdf |
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| Zusammenfassung |
| Herein, we report on the development of a compact proton-transfer-reaction
time-of-flight mass spectrometer (PTR-ToF-MS) for airborne measurements of volatile
organic compounds (VOCs). The new instrument resolves isobaric ions with a
mass resolving power (m/Δm) of ~1000, provides accurate m/z
measurements (Δm < 3 mDa), records full mass spectra at
1 Hz and thus overcomes some of the major analytical deficiencies of
quadrupole-MS-based airborne instruments. 1 Hz detection limits for biogenic
VOCs (isoprene, α total monoterpenes), aromatic VOCs (benzene,
toluene, xylenes) and ketones (acetone, methyl ethyl ketone) range from 0.05
to 0.12 ppbV, making the instrument well-suited for fast measurements of
abundant VOCs in the continental boundary layer. The instrument detects and
quantifies VOCs in locally confined plumes (< 1 km), which improves our
capability of characterizing emission sources and atmospheric processing
within plumes. A deployment during the NASA 2013 DISCOVER-AQ mission generated high vertical- and horizontal-resolution in situ data of VOCs and
ammonia for the validation of satellite retrievals and chemistry transport
models. |
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