EP0164133A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Device for measuring ionic activity
Assignee: Fujifilm Holdings Corp
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Filing: 1985-06-07
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Granted: —
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Expires: 2005-06-07
Abstract
Abstract @ A device is disclosed for measuring ionic activity of ions contained in solutions. The device comprises a lower supporting frame, at least one pair of ion-selective electrodes, an upper supporting frame made of a thermoplastic material having at least one pair of apertures for spotting reference and sample solutions, and at least one porous bridge for effecting an electrical conduction between both solutions. Both ends of the porous bridge are fixed on the upper supporting frame by softening or melting of the the thermoplastic material such that the porous bridge is extended over the pair of the apertures.
Inventors
- 👤 Osamu Seshimoto
- 👤 Akira Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 08:36
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/307
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
116 words
A device for measuring ionic activity comprising a lower supporting frame, at least one pair of ion-selective electrodes disposed on said lower supporting frame, an upper supporting frame made of a thermoplastic material having at least one pair of apertures for liquid-spotting leading to the respective ion-selective electrodes, and at least one porous bridge for effecting an electrical conduction between a sample solution spotted on one of said pair of apertures for liquid-spotting and a reference solution spotted on the other, both ends of said porous bridge being fixed on said upper supporting frame by softening or melting of the thermoplastic material such that said porous bridge is extended over said pair of apertures for liquid-spotting.
Claim 2
Independent Claim
116 words
A device for measuring ionic activity comprising a lower supporting frame, at least one pair of ion-selective electrodes disposed on said lower supporting frame, an upper supporting frame made of a thermoplastic material having at least one pair of apertures for liquid-spotting leading to the respective ion-selective electrodes, and at least one porous bridge for effecting an electrical conduction between a sample solution spotted on one of said pair of apertures for liquid-spotting and a reference solution spotted on the other, both ends of said porous bridge being fixed on said upper supporting frame by softening or melting of the thermoplastic material such that said porous bridge is extended over said pair of apertures for liquid-spotting.
Claim 3
Dependent Claim
27 words
A device for measuring ionic activity as defined in Claim 1 wherein said softening or melting of the thermoplastic material is effected by means of a heater.
Claim 4
Dependent Claim
27 words
A device for measuring ionic activity as defined in Claim 1 wherein said softening or melting of the thermoplastic material is effected by means of ultrasonic waves.
Claim 5
Dependent Claim
54 words
A device for measuring ionic activity as defined in Claim 1 wherein at least one pair of protruded portions are formed on said upper supporting frame, said pair of protruded portions sandwiching said pair of apertures for liquid-spotting therebetween, and the both ends of said porous bridge are fixed with the respective protruded portions.
Claim 6
Dependent Claim
35 words
A device for measuring ionic activity as defined in Claim 4 wherein said pair of protruded portions are located at positions deviated from extensions of the line connecting the centers of said pair of apertures.
Claim 7
Dependent Claim
28 words
A device for measuring ionic activity as defined in Claim 1 wherein said porous bridge is fixed on said upper supporting frame with chips of the thermoplastic material.
Claim 8
Dependent Claim
28 words
A device for measuring ionic activity as defined in Claim 1 wherein said upper supporting frame has a concave portion formed between said pair of apertures for liquid-spotting.
Claim 9
Dependent Claim
39 words
A device for measuring ionic activity as defined in Claim 1 further comprising a water-impervious layer having through holes corresponding to said pair of apertures for liquid-spotting disposed between said upper supporting frame and said pair of ion-selective electrodes.
Claim 10
Dependent Claim
26 words
A device for measuring ionic activity as defined in Claim 8 wherein the lower surface of said water impervious layer is coated with an unplasticized adhesive.
References Cited (Backward Citations)
No citation records indexed.
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