pH-Insensitive Ion Selective Optode: A Coextraction-Based Sensor for Potassium Ions

DOI to cite this document:: 10.5283/epub.20453

Krause, Christian ; Werner, Tobias ; Huber, Christian ; Wolfbeis, Otto S. ; Leiner, Marc J. P.

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Date of publication of this fulltext: 18 Apr 2011 13:10

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Abstract

A novel type of optical potassium sensor is presented whose response mechanism is virtually insensitive to pH and ionic strength. It is based on a coextraction mechanism using a lipophilic ion carrier and a fluorescent anion, the two contained in a solid oil-in-water emulsion. The latter is composed of lipophilic plasticizer droplets (containing valinomycin) and a hydrogel containing the highly ...