Abstract
A ruthenium oxide (RuOx) electrode is being developed as potentiometric pH sensor for organs-on-chip applications. Open-circuit potential (OCP) of the RuOx electrode showed a response of −58.05 mV/pH, with no cross-sensitivity to potentially interfering/complexing ions (tested were lithium, sulfate, chloride, and calcium ions). Similar response was observed in complex biological medium. The electrode stored in liquid had a long-term drift of −0.8 mV/hour (corresponding to ΔpH of 0.013/hour) and response time in complex biological medium was 3.7 s. Minimum cross-sensitivity to oxygen was observed as the OCP shifted ~3 mV going from deoxygenated to oxygenated solution. This response is one magnitude lower than previously reported for metal- oxide pH sensors. Overall, the RuOx pH sensor has proven to be a suitable pH sensor for organs- on-chip applications.
Original language | English |
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Title of host publication | Proceedings of Eurosensors 2018 |
Place of Publication | Basel, Switzerland |
Publisher | MDPI |
Pages | 1-4 |
Number of pages | 4 |
Volume | 2 |
Edition | 13 |
DOIs | |
Publication status | Published - 5 Dec 2018 |
Event | 32nd European Conference on Solid-State Transducers, Eurosensors XXXII 2018 - Graz, Austria Duration: 9 Sep 2018 → 12 Sep 2018 Conference number: 32 http://www.eurosensors2018.eu |
Publication series
Name | Proceedings (MDPI) |
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Publisher | Multidisciplinary Digital Publishing Institute |
ISSN (Print) | 2504-3900 |
Conference
Conference | 32nd European Conference on Solid-State Transducers, Eurosensors XXXII 2018 |
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Abbreviated title | Eurosensors |
Country/Territory | Austria |
City | Graz |
Period | 9/09/18 → 12/09/18 |
Internet address |
Keywords
- potentiometric sensor
- pH sensor
- organs-on-chip
- ruthenium oxide