US4707243A
Expired / Lapsed
US
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Ion selective electrode
Assignee: Fujifilm Holdings Corp
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Filing: 1986-04-11
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Granted: 1987-11-17
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Expires: 2006-04-11
Abstract
Abstract An integral ion selective electrode for the analysis of a potassium ion comprising: (I) a support; (II) an electroconductive metal layer such as a silver metal layer; (III) a layer of a water-insoluble salt of said metal such as a silver chloride layer; (IV) an electrolyte layer which comprises crystalline electrolyte salts of cations including a potassium ion and a sodium ion with the same anions as the anion of the water-insoluble salt, said electrolyte layer being substantially free from a binder; and (V) a potassium ion selective layer.
Inventors
- 👤 Osamu Seshimoto
- 👤 Mitsuharu Nirasawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:49
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
96 words
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 μm; and (V) a potassium ion selective layer.
Claim 2
Dependent Claim
96 words
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 μm; and (V) a potassium ion selective layer.
Claim 3
Dependent Claim
27 words
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.
Claim 4
Dependent Claim
24 words
The ion selective electrode as claimed in claim 1, wherein the mean size of the crystalline electrolyte salt ranges from 0.1 to 40 μm.
Claim 5
Dependent Claim
24 words
The ion selective electrode as claimed in claim 1, 2 or 3, wherein said elecrolyte salts essentially consist of potassium chloride and sodium chloride.
Claim 6
Dependent Claim
43 words
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.
Claim 7
Dependent Claim
133 words
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° C.
Claim 8
Dependent Claim
133 words
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° C.
Claim 9
Dependent Claim
121 words
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.
Claim 10
Dependent Claim
121 words
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.
Claim 11
Dependent Claim
46 words
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° C.
Claim 12
Dependent Claim
35 words
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.
Claim 13
Dependent Claim
52 words
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.
References Cited (Backward Citations)
US4487679A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |