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- Title
Facile Fabrication of Zirconia Modified Screen-Printed Carbon Electrodes for Electrochemical Sensing of Phosphate.
- Authors
Cheng, Wan‐Ling; Chang, Jen‐Lin; Su, Ya‐Ling; Zen, Jyh‐Myng
- Abstract
We report here a facile method to immobilize zirconia nanoparticles on a disposable screen-printed carbon electrode (designated as ZrO2-SPCE) for phosphate sensor application. Simply by ultrasonicating a bare SPCE in a ZrO2 slurry, ZrO2 nanoparticles can be immobilized effectively on the electrode surface as verified by surface characterization evidences. Using ferricyanide as a redox probe, an increase in the charge transfer resistance ( Rct) of ferricyanide upon adsorption of phosphate on ZrO2 is used for the determination of phosphate. This ZrO2-SPCE phosphate sensor shows a wide linear range up to 1 mM and a detection limit of 1.69 µM ( S/ N=3). Practical applicability of the ZrO2-SPCE is demonstrated by detecting phosphate content in human blood samples.
- Subjects
ZIRCONIUM oxide; ZIRCONIUM compounds; CARBON electrodes; ELECTRODES; NANOPARTICLES
- Publication
Electroanalysis, 2013, Vol 25, Issue 12, p2605
- ISSN
1040-0397
- Publication type
Article
- DOI
10.1002/elan.201300387