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| Titel |
Technical Note: Performance of Chemical Ionization Reaction Time-of-Flight Mass Spectrometry (CIR-TOF-MS) for the measurement of atmospherically significant oxygenated volatile organic compounds |
| VerfasserIn |
K. P. Wyche, R. S. Blake, A. M. Ellis, P. S. Monks, T. Brauers, R. Koppmann, E. C. Apel |
| 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 ; 7, no. 3 ; Nr. 7, no. 3 (2007-02-08), S.609-620 |
| Datensatznummer |
250004551
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| Publikation (Nr.) |
 copernicus.org/acp-7-609-2007.pdf |
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| Zusammenfassung |
| The performance of a new chemical ionization reaction time-of-flight
mass spectrometer (CIR-TOF-MS) utilising the environment chamber
SAPHIR (Simulation of Atmospheric Photochemistry In a large Reaction
Chamber- Forschungzentrum Jülich, Germany) is described. The
work took place as part of the ACCENT (Atmospheric Composition and
Change the European NeTwork for excellence) supported oxygenated
volatile organic compound (OVOC) measurement intercomparison during
January 2005. The experiment entailed the measurement of 14
different atmospherically significant OVOCs at various mixing ratios
in the approximate range 10.0–0.6 ppbV. The CIR-TOF-MS operated
throughout the exercise with the hydronium ion (H3O+) as
the primary chemical ionization (CI) reagent in order to facilitate
proton transfer to the analyte OVOCs. The results presented show
that the CIR time-of-flight mass spectrometer is capable of
detecting a wide range of atmospheric OVOCs at mixing ratios of
around 10 ppbV in "real-time" (i.e. detection on the one-minute time
scale), with sub-ppbV measurement also achieved following an
increase in averaging time to tens of minutes. It is shown that in
general OVOC measurement is made with high accuracy and precision,
with integration time, mixing ratio and compound dependent values as
good as 4–13% and 3–15% respectively. It is demonstrated
that CIR-TOF-MS has rapid multi-channel response at the required
sensitivity, accuracy and precision for atmospheric OVOC
measurement. |
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