PH sensing method based upon the potential difference between two electrochemical waves
US11035822B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | Sep 6, 2018 |
| Grant date | Jun 15, 2021 |
| Priority date | — |
| Expiry date | Apr 23, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/308
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor and a corresponding method measure the pH of a solution without using an external reference electrode. The pH sensor has at least one functionalized electrode with an attached first redox active molecule and an attached second redox active molecule that are differently sensitive to pH and oxidize/reduce at different voltages, and a difference in peaks of a response of the two molecules to applied electrical parameter is measured and correlated to a particular pH.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.