Device for determining ionic activity
First Claim
1. In a device for determining ionic activity composed of plural pairs of solid electrodes each pair having an ion-selective layer selectively responsive to a specific predetermined ion as the outermost layer of the solid electrodes and one porous bridge formed thereon for achieving, after supplying a test solution and a reference solution to said pairs of solid electrodes, the electrical conduction between both electrodes in each said pair by the permeation of the solutions through the porous bridge, the improvement comprising said plural pairs of solid electrodes, each electrode pair having one electrode on each of two sides and having a different ion-selective layer, at least one liquid distribution porous member provided for each said side of plural pairs of solid electrodes so that said liquid distribution porous member covers at least partially all the electrodes at each said side, and said bridge disposed on or between said liquid distribution members.
1 Assignment
0 Petitions
Accused Products
Abstract
A device for determining ionic activity composed of, as essential components, plural pairs of ion-selective solid electrodes each pair having two electrodes (one electrode on each of two sides) and each pair having a different ion-selective layer; two liquid distribution porous members, each member disposed over all the electrodes of each said side of the plural pairs; and a porous capillary bridge disposed on or between the liquid distribution porous members. The bridge can be in liquid contact with all the electrodes through the liquid distribution porous members and achieve electrical conduction between two electrodes in each pair after spotting a test solution and a reference solution. The device preferably further comprises a support frame and a cover having two apertures for liquid spotting. The device can simultaneously determine ionic activities of a plurality of different ions in a test solution, such as whole blood, plasma, serum, urine, etc., by spotting a test solution and a reference solution each in one operation and measuring an electrical potential difference of each pair.
30 Citations
19 Claims
- 1. In a device for determining ionic activity composed of plural pairs of solid electrodes each pair having an ion-selective layer selectively responsive to a specific predetermined ion as the outermost layer of the solid electrodes and one porous bridge formed thereon for achieving, after supplying a test solution and a reference solution to said pairs of solid electrodes, the electrical conduction between both electrodes in each said pair by the permeation of the solutions through the porous bridge, the improvement comprising said plural pairs of solid electrodes, each electrode pair having one electrode on each of two sides and having a different ion-selective layer, at least one liquid distribution porous member provided for each said side of plural pairs of solid electrodes so that said liquid distribution porous member covers at least partially all the electrodes at each said side, and said bridge disposed on or between said liquid distribution members.
- 11. In a device for determining ionic activity composed of plural pairs of solid electrodes each pair having an ion-selective layer selectively responsive to a specific predetermined ion as the outermost layer of the solid electrodes, after supplying a test solution and a reference solution to said pairs of solid electrodes by one porous bridge being brought into contact with said both solutions, achieving the electrical conduction between both electrodes in each said pair by the permeation of both solutions through said porous bridge, the improvement comprising said plural pairs of solid electrodes, each electrode pair having one electrode on each of two sides and having a different ion-selective layer and at least one liquid distribution porous members provided for each said side of plural pairs of solid electrodes so that said liquid distribution porous member covers at least partially all the electrodes at each said side.
Specification