Exploitation of a pH-sensitive hydrogel for CO2 detection

S. Herber, Wouter Olthuis, Piet Bergveld, Albert van den Berg

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    In this paper is described how hydrogel is exploited as sensor material for the detection of carbon dioxide (CO2). A pH-sensitive hydrogel disc, which swells and deswells in response to pH changes, was clamped between a pressure sensor membrane and a porous metal screen together with a bicarbonate solution. Bicarbonate reacts with CO2 resulting in a pH change. The enclosed hydrogel will generate pressure as a response to the pH change. This pressure is a measure for the partial pressure of CO2. The main advantage of this sensor principle is the lack of a reference electrode as required for potentiometric sensors.
    Original languageEnglish
    Title of host publicationProceedings of the 17th European Conference on Solid-State Transducers (EUROSENSORS), Braga, Portuga
    Place of PublicationBraga, Portugal
    PublisherBarbarosa & Xavier
    Number of pages2
    ISBN (Print)972-98603-1-9
    Publication statusPublished - 21 Sept 2003
    EventEurosensors XVII, European Conference on Solid-State Transducers - Guimaraes, Portugal
    Duration: 21 Sept 200324 Sept 2003


    ConferenceEurosensors XVII, European Conference on Solid-State Transducers

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