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- Title
Screen Printed Alizarin-Based Carbon Electrodes: Monitoring pH in Unbuffered Media.
- Authors
Dai, Chencheng; Song, Peng; Wadhawan, Jay D.; Fisher, Adrian C.; Lawrence, Nathan S.
- Abstract
An alizarin based voltammetric pH sensor is introduced. This device is fabricated by screen printing the alizarin, which is a pH-sensitive redox compound, mixed with carbon ink onto the carbon aluminum (aluminum foil coated with carbon paste). This electrode shows a Nernst response to both the buffered and unbuffered media, with a potential shift by 55.8 mV/pH unit and a working range up to pH 10. This approach suggests a disposable, reproducible, low-cost method for pH sensing with the possibility of miniaturization. A further study of this type of sensor coated with nafion reveals a possible method to expand the working range and improve the stability.
- Subjects
ALIZARIN; NAFION; FLUOROPOLYMERS; SCREEN process printing; ALUMINUM foil
- Publication
Electroanalysis, 2015, Vol 27, Issue 4, p917
- ISSN
1040-0397
- Publication type
Article
- DOI
10.1002/elan.201400704