Sol–gel based optical carbon dioxide sensor employing dual luminophore referencing for application in food packaging technology

DOI to cite this document:: 10.5283/epub.20434

von Bueltzingsloewen, C. ; McEnvoy, A. K. ; McDonagh, C. ; MacCraith, B. D. ; Klimant, I. ; Krause, C. ; Wolfbeis, Otto S.

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Date of publication of this fulltext: 15 Apr 2011 08:42

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Abstract

An optical sensor for the measurement of carbon dioxide in Modified Atmosphere Packaging (MAP) applications has been developed. It is based on the fluorescent pH indicator 1-hydroxypyrene-3,6,8-trisulfonate (HPTS) immobilised in a hydrophobic organically modified silica (ormosil) matrix. Cetyltrimethylammonium hydroxide was used as an internal buffer system. Fluorescence is measured in the phase ...