Solid-state ion sensor

Details Solid-state ion sensor Solid-state ion sensor

1994-03-29

1996-04-09

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204416, G01N 27333

Patent

active

055058361

ABSTRACT:
The solid-state ion sensor of the present invention comprises an inner electrode comprising a metal and a water-insoluble salt of the metal which covers at least a part of the surface of the metal, an ion-selective membrane selectively responsive to the ion species to be determined, and an intermediate layer comprising a hydrophilic polymeric membrane provided between the inner electrode and the ion-selective membrane. The inner electrode comprises a metal and a halogenide of the metal which covers at least a part of the surface of the metal. In the hydrophilic polymeric membrane is dispersed a hydrophilic electrolyte having halogen ions same as or different from those constituting the halogenide with the weight ratio of the electrolyte and the polymer [(electrolyte) wt. %/(polymer) wt. %] being at least 1/100. A polymeric ion-conductor can be used as the hydrophilic polymeric membrane.

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patent: 5413685 (1995-05-01), Ozawa et al.

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