Claims
- 1. An integral ion selective electrode for analysis of a potassium ion comprising in the following order:
- (I) a support;
- (II) an electroconductive metal layer;
- (III) a layer of a water-insoluble salt of said metal;
- (IV) an electrolyte layer which comprises crystalline electrolyte salts of cations including a potassium ion and a sodium ion with the same anion as the anion of the water-insoluble salt, said electrolyte layer being substantially free from a binder, wherein the mean crystal size of the crystalline electrolyte salt is not more than 50 .mu.m; and
- (V) a potassium ion selective layer.
- 2. The ion selective electrode as claimed in claim 1, wherein the potassium salt content ranges from 0.08 to 0.75% by weight based on the whole electrolyte salts.
- 3. The ion selective electrode as claimed in claim 1, wherein the mean size of the crystalline electrolyte salt ranges from 0.1 to 40 .mu.m.
- 4. The ion selective electrode as claimed in claim 1, 2 or 3, wherein said elecrolyte salts essentially consist of potassium chloride and sodium chloride.
- 5. The ion selective electrode as claimed in claim 1, 2 or 3, wherein said electroconductive metal layer is made of silver, said layer of a water-insoluble salt is of silver chloride and said elecrolyte salts substantially consist of potassium chloride and sodium chloride.
- 6. A process for the preparation of an integral ion selective electrode for analysis of a potassium ion comprising in the following order (I) a support, (II) an electroconductive metal layer, (III) a layer of a water-insoluble salt of said metal (IV) an electrolyte layer which comprises crystalline electrolyte salts of cations including a potassium ion and 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 (V) a potassium ion selective layer,
- comprising forming the electrolyte layer by coating an aqueous solution of said electrolyte salts 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.degree. C.
- 7. A process for the preparation of an integral ion selective electrode for analysis of a potassium ion comprising in the following order (I) a support, (II) an electroconductive metal layer, (III) a layer of a water-insoluble salt of said metal (IV) an electrolyte layer which comprises crystalline electrolyte salts of cations including a potassium ion and 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 (V) a potassium ion selective layer,
- comprising forming the electrolyte layer by coating a solution of said electrolyte salts in a mixture of water and an organic solvent on the layer of a water-insoluble salt and drying the thus coated layer.
- 8. The process for the preparation of an integral ion selective electrode as claimed in claim 7, wherein said stage of drying the coated layer is performed by bringing it in contact with a stream of gas maintained at a temperature of not lower than 40.degree. C.
- 9. The process for the preparation of an integral ion selective electrode as claimed in claim 7, wherein said mixture of water and an organic solvent is in the range of 2:8 to 8:2 by weight.
- 10. The process for the preparation of an integral ion selective electrode as claimed in claim 7, 8, or 9, wherein said organic solvent is selected from the group consisting of a lower aliphatic alcohol, an aliphatic ketone, an ether, and an ester of a lower aliphatic acid with a lower aliphatic alcohol.
Priority Claims (2)
Number |
Date |
Country |
Kind |
59-128239 |
Jun 1984 |
JPX |
|
59-128240 |
Jun 1984 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 747,003, filed June 19, 1985, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4487679 |
Stare |
Dec 1984 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
747003 |
Jun 1985 |
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