Potassium ion-selective compositions and electrodes containing same
US4608149A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1985 |
| Grant date | Aug 26, 1986 |
| Priority date | — |
| Expiry date | Sep 30, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2410/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Potassium ion-selective compositions which comprise valinomycin and a particular carrier solvent capable of solvating valinomycin are disclosed. The carrier solvent is a dicarboxylic acid diester having at least 25 carbon atoms, a viscosity of less than about 120 centipoise at 20.degree. C. and a boiling point greater than about 170.degree. C. at 5 mm pressure. A preferred carrier solvent is diisodecyl phthalate. Membranes prepared from these compositions preferably have a glass transition temperature greater than about -50.degree. C. These membranes are particularly useful in dry-operative potassium ion-selective electrodes which are capable of selectively determining potassium ions in preference to other ions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.