EP0167126A2
Expired / Lapsed
EP
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pH Sensor
Assignee: Terumo Corp
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Filing: 1985-06-28
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Granted: —
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Expires: 2005-06-28
Abstract
Abstract A pH sensor includes a substrate (11) formed of an electrically conductive carbon material. A hydrogen ion-sensitive layer (13) is formed on the substrate surface. The layer (13) is formed of an electro-oxidation polymer of a nitrogen-containing aromatic compound selected from the group consisting of 1-aminopyrene and a mixture of 1-aminopyrene and pyridine.
Inventors
- 👤 Norihiko Ushizawa
- 👤 Tsutomu Murakami
- 👤 Takeshi Shimomura
- 👤 Noboru Oyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 08:58
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
50 words
A pH sensor comprising: a substrate formed of an electrically conductive carbon material; and a hydrogen ion-sensitive layer formed on the substrate surface, said layer being formed of an electrooxidation polymer of a nitrogen-containing aromatic compound selected from the group consisting of 1-aminopyrene and a mixture of 1-aminopyrene and pyridine.
Claim 2
Dependent Claim
50 words
A pH sensor comprising: a substrate formed of an electrically conductive carbon material; and a hydrogen ion-sensitive layer formed on the substrate surface, said layer being formed of an electrooxidation polymer of a nitrogen-containing aromatic compound selected from the group consisting of 1-aminopyrene and a mixture of 1-aminopyrene and pyridine.
Claim 3
Dependent Claim
33 words
The pH sensor according to claim 1, characterized in that said hydrogen ion-sensitive layer is formed of an electrolytic oxidation copolymer consisting of substantially the same molar amount of 1-aminopyrene and pyridine units.
Claim 4
Dependent Claim
24 words
The pH sensor according to claim 1, characterized in that the thickness of the hydrogen ion-sensitive layer ranges between 1 µm and 1 mm.
Claim 5
Dependent Claim
20 words
The pH sensor according to claim 1, characterized by further comprising a protective film formed on the hydrogen ion-sensitive layer.
Claim 6
Dependent Claim
34 words
The pH sensor according to claim 4, characterized in that the protective layer is formed of a material selected from the group consisting of poly(hydroxyethyl methacrylate), nitro cellulose, acetyl cellulose, regenerated cellulose and polycarbonate.
Claim 7
Dependent Claim
23 words
The pH sensor according to claim 4, characterized in that the thickness of the protective layer ranges between 0.1 µm and 300 µm.
References Cited (Backward Citations)
No citation records indexed.
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