An improved method for the determination of dissolved nitric oxide (NO) in seawater samples.

Lutterbeck, Hannah E. and Bange, Hermann W. (2015) An improved method for the determination of dissolved nitric oxide (NO) in seawater samples. Open Access Ocean Science, 11 . pp. 937-946. DOI 10.5194/os-11-937-2015.

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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 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. 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.

Document Type: Article
Additional Information: WOS:000367459700006
Keywords: nitric oxide, method development
Research affiliation: OceanRep > SFB 754 > B4
OceanRep > SFB 754
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.5194/os-11-937-2015
ISSN: 1812-0784
Projects: SFB754
Expeditions/Models/Experiments:
Date Deposited: 08 Jun 2015 12:22
Last Modified: 19 Dec 2017 12:51
URI: http://oceanrep.geomar.de/id/eprint/28952

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