Material for establishing solid state contact for ion selective electrodes
US6251246A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1998 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Feb 26, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/414
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A polymeric material which to form a stable, reproducible interface between the ionic and electronic domains of an ion selective sensor, or an ion selective field effect transistor, or the like is provided. When employed in an ion selective sensor, the polymeric material is advantageously provided over a solid internal reference electrode and an ion selective material is provided thereover. According to one embodiment, the polymeric material of the invention includes less than about 1.63.times.10.sup.21 immobilized charged sites per gram (less than about 2.72 millaequivalents/gram). According to another embodiment, the polymeric material includes immobilized sites of charge opposite that of mobile ions involved in the redox couple. A preferred polymeric material comprises a copolymer of methacrylamidopropyltrimethylammoniumchloride and methylmethacrylate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.