EP0592805A2
Expired / Lapsed
EP
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Carbon sensor electrode and process for producing the same
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1993-09-06
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Granted: —
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Expires: 2013-09-06
Abstract
Abstract A carbon electrode is dipped in a solution containing a reactant (12), and the carbon electrode impregnated with the solution is covered with an insulating outer layer (11); or a solution containing a reactant is poured into an insulating tube, and a carbon electrode is inserted into the tube; whereby the reactant is made coexistent in the periphery of the carbon electrode. Alternatively, a reactant such as an active enzyme and graphite particles or activated carbon particles (13) are mixed with a liquid and dispersed therein to prepare a thoroughly wetted paste (14). The paste is introduced by means of an extruding mechanism (16, 17) such as a syringe into an insulating outer layer member in which a bundle of many thin carbon rods as a lead is inserted. Thus, a carbon sensor electrode is produced.
Inventors
- 👤 Hiroko Kaneko
- 👤 Akira Negishi
- 👤 Ken Nozaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 19:07
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/001; G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/308
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
33 words
A carbon sensor electrode characterized by comprising: an insulating outer layer; a solution containing a reactant filled inside the insulating outer layer; and a carbon electrode inserted in the solution containing the reactant.
Claim 2
Dependent Claim
24 words
A carbon sensor electrode as claimed in claim 1, characterized in that the carbon electrode is a bundle of many carbon fibers put together.
Claim 3
Dependent Claim
24 words
A carbon sensor electrode as claimed in claim 1, characterized in that the carbon electrode is a bundle of many carbon rods put together.
Claim 4
Dependent Claim
25 words
A carbon sensor electrode as claimed in any one of claims 1 to 3, characterized in that the insulating outer layer is an insulating tube.
Claim 5
Dependent Claim
27 words
A carbon sensor electrode as claimed in any one of claims 1 to 3, characterized in that the insulating outer layer is composed of an insulating sheet.
Claim 6
Dependent Claim
117 words
A carbon sensor electrode as claimed in any one of claims 1 to 5, characterized in that the reactant is an organic substance including an active enzyme, a nitrogen metabolite such as uric acid, an amino acid metabolite, a neurotransmitter such as dopamine, a vitamin, an organic acid such as acetic acid or citric acid, an amine, an alcohol, or a medicine such as an anesthetic; a complex ion; an inorganic acid such as hydrochloric acid or sulfuric acid; an alkali such as ammonia or hydroxide; a salt of the inorganic acid and alkali; a soluble gas such as oxygen, chlorine or nitrogen oxide; a mixture of any of these; or a substance containing any of them.
Claim 7
Dependent Claim
34 words
A carbon sensor electrode characterized by comprising: an insulating outer layer; and a carbon paste filled inside the insulating outer layer; the carbon paste comprises at least a fine carbon material and a carrier.
Claim 8
Dependent Claim
34 words
A carbon sensor electrode as claimed in claim 7, characterized in that the fine carbon material is selected from activated carbon particles, graphite particles, amorphous carbon particles, short carbon fibers, and mixtures of these.
Claim 9
Dependent Claim
50 words
A process for producing a carbon sensor electrode characterized by comprising; dipping a carbon electrode in a solution containing a reactant; and covering the carbon electrode with an insulating outer layer with the solution being held in place to make the reactant coexistent in the periphery of the carbon electrode.
Claim 10
Dependent Claim
25 words
A process for producing a carbon sensor electrode as claimed in claim 9 , characterized in that the insulating outer layer is an insulating tube.
Claim 11
Dependent Claim
70 words
A process for producing a carbon sensor electrode characterized by comprising; pouring a solution containing a reactant into an insulating tube; and inserting a carbon electrode into the tube to impregnate the carbon electrode with the reactant, hold the reactant in place in the carbon electrode, and chemically modify the carbon electrode with the reactant, as well as to make the reactant coexistent in the periphery of the carbon electrode.
Claim 12
Dependent Claim
41 words
A process for producing a carbon sensor electrode characterized by comprising: homogeneously mixing at least a fine carbon material and a carrier with a dispersing medium to prepare a carbon paste; and placing the carbon paste inside a tubular outer layer.
References Cited (Backward Citations)
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