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Mass spectrometry as en ecological tool for in situ measurement of dissolved gases in sediment systems

Lloyd, D, Davies, KJP and Boddy, Lynn 1986. Mass spectrometry as en ecological tool for in situ measurement of dissolved gases in sediment systems. FEMS Microbiology Ecology 2 (1) , 11--17. 10.1111/j.1574-6968.1986.tb01933.x

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Abstract

The use of membrane-inlet quadrupole mass spectrometry, as a method for quantitative monitoring of dissolved gases in natural or semi-natural environments, is described. Its advantages over other methods lie in the fact that it provides an accurate, sensitive means for non-invasive, continuous analysis of several dissolved gases simultaneously. The potential of mass spectrometry as an ecological tool is illustrated by representative results from measurements made on undisturbed and experimentally amended estuarine and fresh-water sediments.Dissolved gas profiles from the surface to a depth of 10 cm in the estuarine sediment showed that the dissolved oxygen decreased gradually until at 10 cm it was undetectable (< 0.25 μM); dinitrogen reached a maximum at 6 cm, where oxygen was 20 μM. In a fresh-water sediment, methane reached 1.5 mM at 10 cm depth. NOx was also detected; quantitation of carbon dioxide necessitates a correction for the contribution of NOx. Manipulation of conditions (gas phase, nitrogen and carbon sources) permitted ecological modelling.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Publisher: Wiley
ISSN: 0168-6496
Date of Acceptance: 2 January 1986
Last Modified: 27 Feb 2020 11:00
URI: http://orca.cf.ac.uk/id/eprint/127975

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