Electro-chemical sensor
US9377434B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2010 |
| Grant date | Jun 28, 2016 |
| Priority date | — |
| Expiry date | Jan 22, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electrochemical sensor for the presence or concentration of an analyte has at least one electrode and at least one electrochemically active species able to undergo electrochemical reaction in response to electrical potential applied to the electrode, where the said reaction is modified by the presence of the analyte. This sensor has the novel characteristic that at least one said electrochemically active species is encapsulated within polymer particles. These particles are preferably formed from an amorphous polymer with a glass transition temperature above the temperature of the fluid to which the sensor is exposed. The encapsulating polymer protects the analyte species from degradation, but a small analyte such as a hydrogen or bisulfide ion can pass through the polymer and undergo reaction at the active species.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.