Manufacture and application of RuO2 solid-state metal-oxide pH sensor to common beverages
Abstract
A new reproducible solid-state metal-oxide pH sensor for beverage quality monitoring is developed and characterised. The working electrode of the developed pH sensor is based on the use of laser-etched sputter-deposited RuO2 on Al2O3 substrate, modified with thin layers of sputter-deposited Ta2O5 and drop-cast Nafion for minimisation of redox interference. The reference electrode is manufactured by further modifying a working electrode with a porous polyvinyl butyral layer loaded with fumed SiO2. The developed pH sensor shows excellent performance when applied to a selection of beverage samples, with a measured accuracy within 0.08 pH of a commercial glass pH sensor.
Keywords
[RstdPub], Beverages, Nafion, pH-sensor, RuO2, Solid-state, Ta2O5, Aluminum compounds, Beverages, Electrodes, Metallic compounds, Metals, pH, Ruthenium compounds, Silica, Tantalum compounds, Nafion, Polyvinyl butyral, Quality monitoring, Reference electrodes, RuO2, Solid state metals, Ta2O5, Working electrode, pH sensors
Document Type
Journal Article
Date of Publication
2018
Publication Title
Talanta
Publisher
Elsevier BV
School
School of Science
RAS ID
27879
Copyright
subscription content
Comments
Lonsdale, W., Wajrak, M., & Alameh, K. (2018). Manufacture and application of RuO2 solid-state metal-oxide pH sensor to common beverages. Talanta, 180, 277-281. Available here