Abstract
A pH-sensitive RuO2 electrode coated in a commercial cyanoacrylate adhesive typically exhibits very low pH sensitivity, and could be paired with a RuO2 working electrode as a differential type pH sensor. However, such sensors display poor performance in real sample matrices. A pH sensor employing a RuO2 pH-sensitive working electrode and a SiO2-PVB junction-modified RuO2 reference electrode is developed as an alternative high-performance solution. This sensor exhibits a performance similar to that of a commercial glass pH sensor in some common sample matrices, particularly, an excellent pH sensitivity of 55.7 mV/pH, a hysteresis as low as 2.7 mV, and a drift below 2.2 mV/h. The developed sensor structure opens the way towards the development of a simple, cost effective, and robust pH sensor for pH analysis in various sample matrices.
RAS ID
25676
Document Type
Journal Article
Date of Publication
2017
Location of the Work
Switzerland
School
School of Science / Electron Science Research Institute
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Publisher
MDPI AG
Comments
Lonsdale, W., Wajrak, M., & Alameh, K. (2017). RuO2 pH Sensor with Super-Glue-Inspired Reference Electrode. Sensors, 17(9), 2036. https://doi.org/10.3390/s17092036