Potentiometric measurement with a Kelvin probe: Contactless measurement of chloride ions in aqueous electrolyte

Yawar Abbas, X. Zhu, Hans L. de Boer, N.B. Tanvir, Wouter Olthuis, Albert van den Berg

    Research output: Contribution to journalArticleAcademicpeer-review

    6 Citations (Scopus)


    For the first time the chloride ion concentration in electrolyte is measured using a Kelvin probe. A silver-silver chloride (Ag/AgCl) electrode, which is a chloride ion selective electrode, is used as a sample plate in the electrolyte and the Kelvin probe is used as a reference plate that is vibrating above the electrolyte. The open-circuit potential (OCP) of the Ag/AgCl electrode is a function of the Cl- concentration. The contact potential difference (CPD), measured by the Kelvin probe, gives the OCP of the Ag/AgCl electrode. The measurement does not require any contact between the reference plate and the electrolyte. This approach opens the possibilities for using a Kelvin probe as a contactless reference electrode in electrochemical measurements, such as potentiometry.
    Original languageUndefined
    Pages (from-to)1126-1132
    Number of pages7
    JournalSensors and actuators. B: Chemical
    Publication statusPublished - 29 Nov 2016


    • EWI-27558
    • IR-103134
    • METIS-320931

    Cite this