Ion-selective electrode
US4214968A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1978 |
| Grant date | Jul 29, 1980 |
| Priority date | — |
| Expiry date | Apr 5, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/3335
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A dry-operative ion-selective electrode comprising: PA1 (a) a dried, internal reference electrode, and PA1 (b) in contact with the reference electrode, a hydrophobic ion-selective membrane. The ion-selective electrode described herein requires no preconditioning prior to use in an ion-sensing operation. The reference electrode may comprise either a metal/metal salt reference half-cell or multiple-layer redox couple reference electrode. The hydrophobic membrane includes a binder having dispersed therein a solution of an ion carrier dissolved in a suitable carrier solvent. A preferred embodiment provides for electrodes of the type described wherein the hydrophobic membrane layer is of a predetermined, uniform thickness in regions thereof intended for contact with a sample for analysis. When necessary or desirable, the electrode includes a support. A novel technique for making measurements of ion concentration by reading electrode potential prior to equilibration of the electrode is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.