Small-volume radial flow cell for all-solid-state ion-selective electrodes

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Vazquez M, Bobacka J, Ivaska A, Lewenstam A
Publisher: ELSEVIER SCIENCE BV
Publication year: 2004
Journal: Talanta
Journal acronym: TALANTA
Volume number: 62
Issue number: 1
Start page: 57
End page: 63
Number of pages: 7
ISSN: 0039-9140


Abstract

A flow cell with a radial distribution of four all-solid-state ion selective electrodes (ISEs), or alternatively three ISEs and one reference electrode, was designed and optimized for mass production. The radial distribution of the electrodes reduces the cell volume and is expected to minimize cross-contamination between different electrodes. Two different cell prototypes were developed and tested for all-solid-state K+-ISEs based on a solvent polymeric ion-selective membrane (ISM) and a conducting polymer, poly(3,4-ethylenedioxythiophene), as solid internal contact. In the first prototype, PEDOT was electropolymerized from an aqueous solution of the monomer and the doping ion salt, sodium polystyrenesulfonate (NaPSS). The second prototype employed an aqueous dispersion of PEDOT(PSS) that is commercially available (Baytron P. Bayer AG). Compared to electrochemical synthesis, solution casting of the polymer dispersion was found to be a more advantageous method to deposit the conducting polymer layer aiming at mass production. The resulting prototypes of the flow cell had a small volume (ca. 17-37 mul), which makes them suitable for application in clinical analysis. (C) 2003 Elsevier B.V. All rights reserved.


Keywords

Baytron P, flow cell

Last updated on 2020-28-02 at 04:29