Ion selective electrodes
First Claim
1. An ion selective electrode comprising a metallic conductor, an overlayer of at least one of silver black or platinum black overlying the conductor, a layer of non-liquid hydrophilic material overlying and in intimate contact with said overlayer and a material selective to a specific ion and overlying and in intimate contact with the hydrophilic material.
1 Assignment
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Accused Products
Abstract
An ion selective electrode capable of production in miniaturized form suitable for in vivo monitoring is produced by coating a metal-metal salt half cell with a layer of hydrophilic material containing electrolyte with an over-layer of an ion selective membrane. The coatings may be applied by a dipping and drying process. Stability is enhanced by addition of silver black and platinum black to the half cell and those materials may be added as layers in a similar dip and dry process. A companion reference electrode half cell is made of the same materials that are used in making the "half cell" portion of the selective electrode, except that the reference half cell is coated with a protein layer. Special packaging and a special procedure facilitate calibration.
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Citations
15 Claims
- 1. An ion selective electrode comprising a metallic conductor, an overlayer of at least one of silver black or platinum black overlying the conductor, a layer of non-liquid hydrophilic material overlying and in intimate contact with said overlayer and a material selective to a specific ion and overlying and in intimate contact with the hydrophilic material.
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7. An ion selective electrode comprising a metal-metal salt half cell, a layer of nonliquid hydrophilic material overlying and in intimate contact with the half cell, a material selective to a specific ion and overlying and in intimate contact with the hydrophilic material;
said half cell comprising silver and silver chloride and further comprising both silver black and platinum black.
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8. An ion selective sensing electrode comprising:
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a wire conductor, a portion of which is coated with at least one of silver black and platinum black; means in the form of a water and salt bearing hydrophilic coating of water absorbing substance overlying said coating for forming an immobilized electrolytic layer on said half cell; and an encasing, ion selective protective layer of hydrophobic polymer containing an ion selective material overlying said hydrophilic coating. - View Dependent Claims (9, 10, 11, 12, 13)
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14. In combination, an ion selective electrode and a reference electrode, each comprising reference electrode, each comprising a half-cell formed of like material, the half-cell of each electrode comprising at least one of silver black and platinum black and the reference electrode being overcoated with a layer of protein material;
- said electrodes, except for portions of their electrical conductors, being disposed in a common sealed container containing reference solution.
- View Dependent Claims (15)
Specification