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- Title
An improved method for the determination of dissolved nitric oxide (NO) in seawater samples.
- Authors
Lutterbeck, H. E.; Bange, H. W.
- Abstract
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 was 5 pmolNO in aqueous solution which translates into 0.25 nmolL-1 when using a 20mL 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. Our method is fast and comparably easy to handle thus it opens the door for deciphering the distribution of NO in the ocean and it facilitates laboratory studies on NO pathways.
- Subjects
NITROGEN content of seawater; NITRIC oxide; AQUEOUS solutions; NITROGEN cycle; CHEMILUMINESCENCE
- Publication
Ocean Science Discussions, 2015, Vol 12, Issue 3, p959
- ISSN
1812-0806
- Publication type
Article
- DOI
10.5194/osd-12-959-2015