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| Titel |
An improved method for the determination of dissolved nitric oxide (NO) in seawater samples |
| VerfasserIn |
H. E. Lutterbeck, H. W. Bange |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 11, no. 6 ; Nr. 11, no. 6 (2015-11-27), S.937-946 |
| Datensatznummer |
250117330
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| Publikation (Nr.) |
 copernicus.org/os-11-937-2015.pdf |
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| Zusammenfassung |
| Nitric oxide (NO) is a short-lived intermediate of the oceanic nitrogen
cycle; however, due to its high reactivity, measurements of dissolved NO in
seawater are rare. Here we present an improved method to determine NO
concentrations in discrete seawater samples. The set-up of our system
consisted of a chemiluminescence NO analyser connected to a stripping unit.
The limit of detection for our method is 5 pmol NO in aqueous solution, which
translates into 0.25 nmol L−1 when using a 20 mL seawater sample
volume. Our method was applied to measure high-resolution depth profiles of
dissolved NO during a cruise to the eastern tropical South Pacific Ocean. It
is fast and comparably easy to handle; thus it opens the door for
investigating the distribution of NO in the ocean, and it facilitates
laboratory studies on NO pathways. |
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