Sammanfattning
Carbon cloth was studied as solid-contact material in potentiometric ion sensors by using electrochemical impedance spectroscopy and potentiometry. The ion-to-electron transduction process was studied by electrochemical impedance spectroscopy by using a two-electrode symmetrical cell where a liquid electrolyte was sandwiched between two solid electrodes, including bare glassy carbon (GC), GC/carbon cloth and GC/poly(3,4-ethylenedioxythiophene). Impedance data for different electrode/electrolyte combinations were evaluated and compared. Solid-contact K(+)-selective electrodes were fabricated by coating the carbon cloth with a conventional plasticized PVC-based K(+)-selective membrane via drop casting. These K(+)-sensors showed proper analytical performance and acceptable long-term potential stability (potential drift approximate to 1 mV/day). Solid contact reference electrodes were fabricated in an analogous manner by coating the carbon cloth with a plasticized PVC membrane containing a moderately lipophilic salt. The results indicate that carbon cloth can be used as a solid-contact material in potentiometric ion sensors and pseudo-reference electrodes. (C) 2011 Elsevier Ltd. All rights reserved.
Originalspråk | Odefinierat/okänt |
---|---|
Sidor (från-till) | 10683–10687 |
Antal sidor | 5 |
Tidskrift | Electrochimica Acta |
Volym | 56 |
Utgåva | 28 |
DOI | |
Status | Publicerad - 2011 |
MoE-publikationstyp | A1 Tidskriftsartikel-refererad |
Nyckelord
- Carbon cloth
- Solid-contact material
- Potentiometric ion sensor
- IMPEDANCE