Detection of chloride ion concentration using chronopotentiometry

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    Abstract

    In this paper, a novel approach is reported for the electrochemical measurement of chloride ions using chronopotentiometry. A current pulse is applied at the Ag/AgCl working electrode and the potential change is measured with respect to another identical Ag/AgCl electrode in the bulk electrolyte. The potential difference, given by the Nernst equation, follows an inverse logarithmic trend versus the Cl̅ ion concentrations. The sensitivity of the response is tuneable through the applied current pulse and the corresponding concentration window. The potential response is also influenced by the pH of the electrolyte, this effect is pronounced at low concentration of Cl̅ ions (<; 1 mM KCl) and high pH values (>12 pH). The advantage of this approach is that a bare Ag/AgCl electrode can be used as a pseudo-reference electrode. Additionally tuneable sensitivity is obtained and the dissolution of sparingly soluble AgCl membrane is counteracted. This system can be used for long term application like in-situ measurement of Cl̅ ions in concrete.
    Original languageUndefined
    Title of host publication17th International Conference on Solid-State Sensors, Actuators and Microsystems, Transducers & Eurosensors XXVII
    Place of PublicationUSA
    Publisher978-1-4673-5983-2/13
    Pages2037-2040
    Number of pages4
    ISBN (Print)978-1-4673-5983-2
    DOIs
    Publication statusPublished - 16 Jun 2013
    Event17th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2013 - Barcelona, Spain
    Duration: 16 Jun 201320 Jun 2013
    Conference number: 17
    http://www.transducers-eurosensors2013.org/

    Publication series

    Name
    Publisher978-1-4673-5983-2/13

    Conference

    Conference17th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2013
    Abbreviated titleTRANSDUCERS 2013
    CountrySpain
    CityBarcelona
    Period16/06/1320/06/13
    OtherHeld in conjunction with EUROSENSORS XXVII
    Internet address

    Keywords

    • EWI-24079
    • METIS-300209
    • IR-88177

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