Ion selective electrode and method of preparation thereof
First Claim
1. An integral ion selective electrode for analysis of sodium ion comprising the following layers in order, a support, an electroconductive metal layer, a layer of a water-insoluble salt of said metal, an electrolyte layer which comprises an electrolyte salt of a sodium ion with the same anion as the anion of the water-insoluble salt, said electrolyte layer being substantially free from a binder, and an ion selective layer, wherein the electrolyte layer comprises crystalline electrolyte having a mean crystal size of not more than 8 μ
- m.
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Abstract
An integral ion selective electrode for the analysis of a sodium ion comprising a support, an electroconductive metal layer such as a silver metal layer, a layer of a water-insoluble salt of said metal such as a silver chloride layer, an electrolyte layer which comprises an electrolyte salt of a sodium ion with the same anion as the anion of the water-insoluble salt, said electrolyte layer being substantially free from a binder, and an ion selective layer, which is characterized in that the electrolyte layer comprises crystalline electrolyte having mean size of not more than 8 μm. Processes preferably employable for the preparation of the ion selective electrode are also disclosed.
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Citations
10 Claims
- 1. An integral ion selective electrode for analysis of sodium ion comprising the following layers in order, a support, an electroconductive metal layer, a layer of a water-insoluble salt of said metal, an electrolyte layer which comprises an electrolyte salt of a sodium ion with the same anion as the anion of the water-insoluble salt, said electrolyte layer being substantially free from a binder, and an ion selective layer, wherein the electrolyte layer comprises crystalline electrolyte having a mean crystal size of not more than 8 μ
-
6. A process for the preparation of an integral ion selective electrode for analysis of sodium ion comprising the following layers in order, a support, an electroconductive metal layer, a layer of a water-insoluble salt of said metal, an electrolyte layer which comprises an electrolyte salt of a sodium ion with the same anion as the anion of the water-insoluble salt, said electrolyte layer being substantially free from a binder, and an ion selective layer, wherein the electrolyte layer is formed by coating an aqueous solution of said electrolyte salt on the layer of a water-insoluble salt and drying the thus coated layer by bringing it in contact with a stream of gas maintained at a temperature of not lower than 40°
- C., thereby producing a layer of of crystalline electrolyte having a mean crystal size of not more than 8 μ
m over the layer of a water-insoluble salt.
- C., thereby producing a layer of of crystalline electrolyte having a mean crystal size of not more than 8 μ
-
7. A process for the preparation of an integral ion selective electrode for analysis of sodium ion comprising the following layers in order, a support, an electroconductive metal layer, a layer of a water-insoluble salt of said metal, an electrolyte layer which comprises an electrolyte salt of a sodium ion with the same anion as the anion of the water-insoluble salt, said electrolyte layer being substantially free from a binder, and an ion selective layer, wherein the electrolyte layer is formed by coating a solution of said electrolyte salt in a mixture of water and an organic solvent on the layer of a water-insoluble salt and drying the thus coated layer, thereby producing a layer of of crystalline electrolyte having a mean crystal size of not more than 8 μ
- m over the layer of a water-insoluble salt.
- View Dependent Claims (8, 9, 10)
Specification