Potassium ion-selective compositions and electrodes containing s

Details Potassium ion-selective compositions and electrodes containing s Potassium ion-selective compositions and electrodes containing s

1985-09-30

1986-08-26

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204 1T, 2524081, G01N 2746

Patent

active

046081496

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.

REFERENCES:
patent: 4276141 (1981-06-01), Hawkins
patent: 4476007 (1984-10-01), Toner et al.

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