Silver-chloride reference electrode
First Claim
1. A reference electrode consisting of a silver layer, a layer of silver chloride situated on said silver layer, and a layer of water absorbing, ionically conductive material situated on said silver chloride layer and projecting out over the silver chloride layer, said material being selected from the group consisting of polyurethane and poly(perfluoroalkylene)-sulphonic acid, wherein the acid groups are neutralized.
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Accused Products
Abstract
In the case of a reference electrode with a layer of silver chloride situated on a silver layer, the amount of silver ordinarily released while in use can be significantly reduced by providing the silver-chloride layer with a layer of water absorbing, ionically conductive material which projects out over the surface of the silver-chloride layer.
68 Citations
7 Claims
- 1. A reference electrode consisting of a silver layer, a layer of silver chloride situated on said silver layer, and a layer of water absorbing, ionically conductive material situated on said silver chloride layer and projecting out over the silver chloride layer, said material being selected from the group consisting of polyurethane and poly(perfluoroalkylene)-sulphonic acid, wherein the acid groups are neutralized.
- 4. A method for manufacturing a reference electrode comprising the steps of anodically converting a surface of a silver layer into a silver chloride layer, applying a solution of a water absorbing, ionically conductive material in a solvent to the silver chloride layer, said material being selected from the group consisting of polyurethane and poly(perfluoroalkylene)-sulphonic acid, and removing the solvent to leave a layer of the water absorbing, ionically conductive material.
Specification