Proceedings (Aug 2017)

Solid-Contact Reference Electrode for Ion-Selective Sensors

  • Van Anh T. Dam,
  • Martijn Goedbloed,
  • Marcel A. G. Zevenbergen

DOI
https://doi.org/10.3390/proceedings1040464
Journal volume & issue
Vol. 1, no. 4
p. 464

Abstract

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This work presents a flexible miniaturized ion-selective sensor consisting of a solid-contact reference electrode (RE) and ion-selective electrodes (ISE) fabricated on the same foil. The flexible ion sensor was based on AgCl electrodes screen printed on polyethylene terephthalate foil. The RE was formed by casting a mixture of plasticized polyvinylchloride (PVC) and KCl on the AgCl electrode. The ISE consisted of a stack of AgCl electrode, cellulose gel layer loaded with 0.1 M KCl, and plasticized PVC based ion-selective membrane containing ionophores. The flexible ion sensor showed a sensitivity close to the Nernstian value in a biological relevant range.

Keywords