Development of miniature all-solid-state potentiometric sensing system

Salzitsa Anastasova-Ivanova, Ulriika Mattinen, Aleksandar Radu, Johan Bobacka, Andrzej Lewenstam, Jan Migdalski, Marek Danielewski, Dermot Diamond

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A procedure for the development of a pen-like, multi-electrode potentiometric sensing platform is described. The platform comprises a seven-in-one electrode incorporating all-solid-state ion-selective and reference electrodes based on the conductive polymer (poly(3,4-ethylenedioxythiophene)(PEDOT)) as an intermediate layer between the contacts and ion-selective membranes. The ion-selective electrodes are based on traditional, ionophore-based membranes, while the reference electrode is based on a polymer membrane doped with the lipophilic salt tetrabutyl ammonium tetrabutyl borate (TBA-TBB). The electrodes, controlled with a multichannel detector system, were used for simultaneous determination of the concentration of Pb2+ and pH in environmental water samples. The results obtained using pH-selective electrodes were compared with data obtained using a conventional pH meter and the average percent difference was 0.3%. Furthermore, the sensing system was successfully used for lead-speciation analysis in environmental water samples. (c) 2010 Elsevier B.V. All rights reserved.
Original languageUndefined/Unknown
Pages (from-to)199–205
Number of pages7
JournalSensors and Actuators B: Chemical
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed


  • Water analysis
  • Reference electrode
  • speciation

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