Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Disposable in-field electrochemical potable sensor system for free available chlorine (FAC) detection

  • Chang, Seung-Cheol (Center for Innovative Bio-Physio Sensor Technology, Pusan National University) ;
  • Park, Deog-Su (Center for Innovative Bio-Physio Sensor Technology, Pusan National University)
  • Published : 2007.11.30
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Abstract

The work described in this study concerns the development of a disposable amperometric sensor for the electrochemical detection of a well-known aqueous pollutant, free available chlorine (FAC). The FAC sensor developed used screen printed carbon electrodes (SPCEs) coupled with immobilised syringaldazine, commonly used as an indicator in photometric FAC detection, which was directly immobilised on the surface of SPCEs using a photopolymer PVA-SbQ. To enable in-field analysis of FAC, a prototype hand-held electrochemical analyzer has been developed to withstand the environment with its rugged design and environmentally sealed connections; it operates from two PP3 (9 volt) batteries and is comparable in accuracy and sensitivity to commercial bench top systems. The sensitivity of the FAC sensor developed was $3.5{\;}nA{\mu}M^{-1}cm^{-2}$ and the detection limit for FAC was found to be $2.0{\;}{\mu}M$.

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