Potentiometric sensor and analytical element
US8202409B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2007 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Jun 29, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4035
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A potentiometric sensor with suppressed leak current on the surface of an electrode and improved for a dynamic range and a response speed, in which a redox compound is immobilized through insulative molecules on the surface of a gold electrode, and a current between a source and drain of an insulated gate field-effect transistor along with reaction between an oxidized substance or a reduced substance produced by the reaction of a measured substance in a sample solution injector for supplying the sample solution containing the measured substance and an enzyme and a redox compound on the surface of the gold electrode, is monitored on real time to measure the change of the surface potential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.