title: A nitrate sensitive planar optode; performance and interferences.
abstract: We present a newly developed nitrate sensitive planar optode. It exhibits a linear response to nitrate from 1 to 50 mM at pH 8.0, a fast response time below 10 s and a good lifetime, allowing for fast two dimensional nitrate measurements over long periods of time. Interference from nitrite, chloride and thiocyanate, however, limits the optode's application in environments where these are encountered, notably seawater with its high chloride content.
authors.affiliation: Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby 2800, Denmark.
authors.forename: Lasse L
authors.initials: LL
authors.lastname: Pedersen
authors.affiliation: Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby 2800, Denmark.
authors.forename: Arnaud
authors.initials: A
authors.lastname: Dechesne
authors.affiliation: Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby 2800, Denmark. Electronic address: bfsm@env.dtu.dk.
authors.forename: Barth F
authors.initials: BF
authors.lastname: Smets
keywords: Fast response time; Linear response; Planar nitrate sensor