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Proceedings Paper

Preparation and characterization of transducer layers for opto-electrochemical detection of chlorine in water
Author(s): Ivan Kasik; Jan Mrazek; Ondrej Podrazky; Miroslav Seidl; Petr Tobiska; Vlastimil Matejec; Barna Kovacs; Akos Markovics; Monika Szili; Karla Vlckova
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Paper Abstract

The control of chlorine content in water is an important issue in water treatment. This paper presents an opto-electrochemical approach to the detection of chlorine in water. In this approach, optical changes of a sensing layer caused by its interaction with chlorine are electrically reversed by using a thin conductive and transparent layer of Indium-Tin-Oxide (ITO) deposited in between an optical substrate and the sensing layer acting as an electrode. The paper deals with the preparation and characterization of sensing layers based on commercially available transducers suitable for the detection of chlorine in water and applicable on ITO-coated planar substrates and/or silica optical fibers. Sensing layers of several absorption and luminescent transducers were applied onto ITO layers deposited on planar glass or fiber-optic substrates by electropolymerization or by the sol-gel method. The best response was observed from o-phenylenediamine and polyluminol layers prepared by electropolymerization. The sensitivity and limit of detection of a polyluminol layers are comparable to hygienic limits for the chlorination of water. The parameters of o-phenylenediamine layers obtained up to now are close to these values. A damaging effect of chlorine in higher concentrations on the sensing layers was observed.

Paper Details

Date Published: 16 May 2007
PDF: 8 pages
Proc. SPIE 6585, Optical Sensing Technology and Applications, 65850Z (16 May 2007); doi: 10.1117/12.723642
Show Author Affiliations
Ivan Kasik, Institute of Photonics and Electronics (Czech Republic)
Jan Mrazek, Institute of Photonics and Electronics (Czech Republic)
Ondrej Podrazky, Institute of Photonics and Electronics (Czech Republic)
Miroslav Seidl, Institute of Photonics and Electronics (Czech Republic)
Petr Tobiska, Institute of Photonics and Electronics (Czech Republic)
Vlastimil Matejec, Institute of Photonics and Electronics (Czech Republic)
Barna Kovacs, Univ. of Pecs (Hungary)
Akos Markovics, Univ. of Pecs (Hungary)
Monika Szili, Univ. of Pecs (Hungary)
Karla Vlckova, Czech Technical Univ. (Czech Republic)

Published in SPIE Proceedings Vol. 6585:
Optical Sensing Technology and Applications
Francesco Baldini; Jiri Homola; Robert A. Lieberman; Miroslav Miler, Editor(s)

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