TITLE

A submersible battery-powered flow injection (FI) sensor for the determination of nitrate in estuarine and coastal waters

AUTHOR(S)
David, Anthony R. J.; McCormack, Trevor; Worsfold, Paul J.
PUB. DATE
January 1999
SOURCE
Journal of Automated Methods & Management in Chemistry;Jan1999, Vol. 21 Issue 1, p1
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The design, construction and performance of a remotely deployed submersible flow injection-based nutrient (total oxidized nitrogen) sensor are described. The sensor featured a custom-built microcomputer and a solid-state, flow-through spectrophotometric detector, and the derivatization chemistry was based on in-line coppercadmium reduction of nitrate to nitrite, and diazotization with N1NED and sulphanilamide. The limit of detection was 0.0014 mgl-1 NO3-N and the linear range was 0.0014- 0.77 mgl-1 with a 260 mul sample volume and a 20 mm path length flow cell. Results from submersed deployments in the Tamar estuary and North Sea are also reported.
ACCESSION #
3861144

 

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