Nitrate-selective optical sensor applying a lipophilic fluorescent potential-sensitive dye

DOI to cite this document:: 10.5283/epub.20940

Huber, Christian ; Klimant, Ingo ; Krause, Christian ; Werner, Tobias ; Wolfbeis, Otto S.

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Date of publication of this fulltext: 06 Jun 2011 11:27

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Abstract

An optical sensor has been developed for continuous determination of nitrate that is based on a polymer-stabilized emulsion system consisting of a hydrogel with entrapped plasticizer droplets. The droplets contain a cationic potential-sensitive fluorescent dye (PSD) located near its surface. The cationic PSD also acts as an anion-exchange catalyst that extracts nitrate out of the aqueous solution ...