Emulsion-Based Fluorosensors for Potassium Featuring Improved Stability and Signal Change

DOI to cite this document:: 10.5283/epub.20450

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

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Date of publication of this fulltext: 18 Apr 2011 13:08

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Abstract

A novel kind of potassium optode is presented which is based on the use of lipophilic droplets containing valinomycin and entrapped in a structured hydrogel. A positively charged solvatochromic dye located near the surface of the droplets responds to the valinomycin-assisted extraction of potassium from the sample by dramatic decrease of fluorescence intensity. The dynamic range is from 5 to 100 ...