Sodium ion selective electrode and method of use
US4708776A · kind A · utility
7Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1986 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | Jul 28, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/3335
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved dry-operative ion-selective electrode for the determination of sodium ions in aqueous fluids includes a dried internal reference electrode, a dried reference layer and a sodium ion-selective membrane composed of a binder material. The reference layer contains a metal salt and a hydrophilic binder material, and is buffered to a pH of from about 4 to about 8 with a water-soluble, organic dicarboxylic acid. This electrode can be manufactured with significantly less waste and exhibits improved uniformity in performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.