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| Titel |
Integrated method for the measurement of trace nitrogenous atmospheric bases |
| VerfasserIn |
D. Key, J. Stihle, J.-E. Petit, C. Bonnet, L. Depernon, O. Liu, S. Kennedy, R. Latimer, M. Burgoyne, D. Wanger, A. Webster, S. Casunuran, S. Hidalgo, M. Thomas, J. A. Moss, M. M. Baum |
| 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 ; 4, no. 12 ; Nr. 4, no. 12 (2011-12-20), S.2795-2807 |
| Datensatznummer |
250002154
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| Publikation (Nr.) |
 copernicus.org/amt-4-2795-2011.pdf |
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| Zusammenfassung |
| Nitrogenous atmospheric bases are thought to play a key role in the global
nitrogen cycle, but their sources, transport, and sinks remain poorly
understood. Of the many methods available to measure such compounds in
ambient air, few meet the current need of being applicable to the complete
range of potential analytes and fewer still are convenient to implement
using instrumentation that is standard to most laboratories. In this work,
an integrated approach to measuring trace, atmospheric, gaseous nitrogenous
bases has been developed and validated. The method uses a simple acid
scrubbing step to capture and concentrate the bases as their phosphite
salts, which then are derivatized and analyzed using GC/MS and/or LC/MS. The
advantages of both techniques in the context of the present measurements are
discussed. The approach is sensitive, selective, reproducible, as well as
convenient to implement and has been validated for different sampling
strategies. The limits of detection for the families of tested compounds are
suitable for ambient measurement applications (e.g., methylamine, 1 pptv; ethylamine, 2 pptv; morpholine, 1 pptv; aniline, 1 pptv; hydrazine, 0.1
pptv; methylhydrazine, 2 pptv), as supported by field measurements in an
urban park and in the exhaust of on-road vehicles. |
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