期刊
ELECTROANALYSIS
卷 23, 期 6, 页码 1352-1358出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201000747
关键词
Multi-walled carbon nanotubes; All-solid-state potassium-selective electrodes; Poly(3-octylthiophene); Potentiometry; Impedance spectroscopy
资金
- Abo Akademi University Foundation
Multi-walled carbon nanotubes (MWCNTs) were compared with poly(3-octylthiophene) (POT) as ion-to-electron transducer in all-solid-state potassium ion-selective electrodes with valinomycin-based ion-selective membranes. MWCNTs and POT were mixed with the other components of the potassium ion-selective membrane cocktail (valinomycin, KTpClPB, o-NPOE, PVC, THF) which was then applied on a glassy carbon (GC) substrate to prepare single-piece ion-selective electrodes (SPISEs). Results from potentiometric and impedance measurements showed that the MWCNT-based electrodes have a more reproducuible standard potential and a lower overall impedance than the electrodes based on POT. Both types of electrodes showed similar sensitivity to potassium ions and no redox sensitivity.
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