EP0230645A2
Expired / Lapsed
EP
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Ionic activity measuring device
Assignee: Fujifilm Holdings Corp
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Filing: 1986-12-23
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Granted: —
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Expires: 2006-12-23
Abstract
Abstract An ionic activity measuring device comprises ion selective electrodes, porous liquid distributing members for distributing a reference solution and a sample solution to the ion selective electrodes, a frame for housing the ion selective electrodes and the porous liquid distributing members and provided with a pair of liquid feed holes for feeding the reference solution and the sample solution to the porous liquid distributing members, and a porous bridge for achieving electrical conduction between the reference solution and the sample solution fed in drops to the liquid feed holes. The porous bridge is disposed in a recess formed in the surface of the frame so that the depth of the recess is not smaller than the height of the porous bridge. End portions of the porous liquid distributing members are protruded to regions under the liquid feed holes so that the fed solutions may enter from side faces of the end portions. The porous bridge may extend at positions deviated from centers of the liquid feed holes. The frame may be provided with holes for insertion of potential measuring probes, and air discharging holes.
Inventors
- 👤 Osamu Fuji Photo Film Co. Ltd. Seshimoto
- 👤 Akira Fuji Photo Film Co. Ltd. Yamaguchi
- 👤 Yoshio Fuji Photo Film Co. Ltd. Saito
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 21:48
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/307
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
175 words
An ionic activity measuring device comprising: i) at least one pair of sheet-like ion selective electrodes provided with ion selective layers on their surfaces and electrically isolated from each other, ii) at least one pair of porous liquid distributing members for feeding a reference solution and a sample solution respectively to said ion selective layers of said ion selective electrodes, iii) a frame for housing said ion selective electrodes and/or said porous liquid distributing members therein and provided with a pair of liquid feed holes respectively disposed above said porous liquid distributing members for feeding said reference solution and said sample solution independently of each other to said porous liquid distributing members, and iv) a porous bridge for achieving electrical conduction between said reference solution and said sample solution fed to said pair of the liquid feed holes, wherein the improvement comprises disposing said porous bridge in a recess formed in the surface of said frame, and adjusting the depth of said recess to a value not smaller than the height of said porous bridge.
Claim 2
Dependent Claim
175 words
An ionic activity measuring device comprising: i) at least one pair of sheet-like ion selective electrodes provided with ion selective layers on their surfaces and electrically isolated from each other, ii) at least one pair of porous liquid distributing members for feeding a reference solution and a sample solution respectively to said ion selective layers of said ion selective electrodes, iii) a frame for housing said ion selective electrodes and/or said porous liquid distributing members therein and provided with a pair of liquid feed holes respectively disposed above said porous liquid distributing members for feeding said reference solution and said sample solution independently of each other to said porous liquid distributing members, and iv) a porous bridge for achieving electrical conduction between said reference solution and said sample solution fed to said pair of the liquid feed holes, wherein the improvement comprises disposing said porous bridge in a recess formed in the surface of said frame, and adjusting the depth of said recess to a value not smaller than the height of said porous bridge.
Claim 3
Independent Claim
70 words
A device as defined in Claim l wherein said frame comprises an upper frame half for supporting said at least one pair of the ion selective electrodes therein and provided with said pair of the liquid feed holes for feeding said reference solution and said sample solution independently of each other to said porous liquid distributing members, and a lower frame half for supporting said porous liquid distributing members therein.
Claim 4
Independent Claim
69 words
A device as defined in Claim l wherein said frame comprises an upper frame half for supporting said porous liquid distributing members therein and provided with said pair of the liquid feed holes for feeding said reference solution and said sample solution independently of each other to said porous liquid distributing members, and a lower frame half for supporting said at least one pair of the ion selective electrodes.
Claim 5
Dependent Claim
189 words
An ionic activity measuring device comprising: i) at least one pair of sheet-like ion selective electrodes provided with ion selective layers on their surfaces and electrically isolated from each other, ii) at least one pair of porous liquid distributing members for feeding a reference solution and a sample solution respectively to said ion selective layers of said ion selective electrodes, iii) a frame for housing said ion selective electrodes and/or said porous liquid distributing members therein and provided with a pair of liquid feed holes respectively disposed above said porous liquid distributing members for feeding said reference solution and said sample solution independently of each other to said porous liquid distributing members, and iv) a porous bridge for achieving electrical conduction between said reference solution and said sample solution fed to said pair of the liquid feed holes, wherein the improvement comprises protruding an end portion of at least either one of said porous liquid distributing members to a part of a region under the corresponding liquid feed hole, whereby said reference solution or said sample solution is allowed to enter from the side face of said end portion.
Claim 6
Dependent Claim
189 words
An ionic activity measuring device comprising: i) at least one pair of sheet-like ion selective electrodes provided with ion selective layers on their surfaces and electrically isolated from each other, ii) at least one pair of porous liquid distributing members for feeding a reference solution and a sample solution respectively to said ion selective layers of said ion selective electrodes, iii) a frame for housing said ion selective electrodes and/or said porous liquid distributing members therein and provided with a pair of liquid feed holes respectively disposed above said porous liquid distributing members for feeding said reference solution and said sample solution independently of each other to said porous liquid distributing members, and iv) a porous bridge for achieving electrical conduction between said reference solution and said sample solution fed to said pair of the liquid feed holes, wherein the improvement comprises protruding an end portion of at least either one of said porous liquid distributing members to a part of a region under the corresponding liquid feed hole, whereby said reference solution or said sample solution is allowed to enter from the side face of said end portion.
Claim 7
Dependent Claim
54 words
A device as defined in Claim 4 wherein an end portion of at least said porous liquid distributing member for distributing said sample solution is protruded to a part of said region under the corresponding liquid feed hole, whereby said sample solution is allowed to enter from the side face of said end portion.
Claim 8
Dependent Claim
70 words
A device as defined in Claim 4 wherein said frame comprises an upper frame half for supporting said at least one pair of the ion selective electrodes therein and provided with said pair of the liquid feed holes for feeding said reference solution and said sample solution independently of each other to said porous liquid distributing members, and a lower frame half for supporting said porous liquid distributing members therein.
Claim 9
Dependent Claim
69 words
A device as defined in Claim 4 wherein said frame comprises an upper frame half for supporting said porous liquid distributing members therein and provided with said pair of the liquid feed holes for feeding said reference solution and said sample solution independently of each other to said porous liquid distributing members, and a lower frame half for supporting said at least one pair of the ion selective electrodes.
Claim 10
Dependent Claim
43 words
A device as defined in Claim 4 wherein said porous bridge is disposed in a recess formed in the surface of said frame, and the depth of said recess is adjusted to a value not smaller than the height of said porous bridge.
Claim 11
Dependent Claim
164 words
An ionic activity measuring device comprising: i) at least one pair of sheet-like ion selective electrodes provided with ion selective layers on their surfaces and electrically isolated from each other, ii) at least one pair of porous liquid distributing members for feeding a reference solution and a sample solution respectively to said ion selective layers of said ion selective electrodes, iii) a frame for housing said ion selective electrodes and/or said porous liquid distributing members therein and provided with a pair of liquid feed holes respectively disposed above said porous liquid distributing members for feeding said reference solution and said sample solution independently of each other to said porous liquid distributing members, and iv) a porous bridge for achieving electrical conduction between said reference solution and said sample solution fed to said pair of the liquid feed holes, wherein the improvement comprises extending said porous bridge through said pair of the liquid feed holes at positions deviated from centers of said liquid feed holes.
Claim 12
Dependent Claim
164 words
An ionic activity measuring device comprising: i) at least one pair of sheet-like ion selective electrodes provided with ion selective layers on their surfaces and electrically isolated from each other, ii) at least one pair of porous liquid distributing members for feeding a reference solution and a sample solution respectively to said ion selective layers of said ion selective electrodes, iii) a frame for housing said ion selective electrodes and/or said porous liquid distributing members therein and provided with a pair of liquid feed holes respectively disposed above said porous liquid distributing members for feeding said reference solution and said sample solution independently of each other to said porous liquid distributing members, and iv) a porous bridge for achieving electrical conduction between said reference solution and said sample solution fed to said pair of the liquid feed holes, wherein the improvement comprises extending said porous bridge through said pair of the liquid feed holes at positions deviated from centers of said liquid feed holes.
Claim 13
Dependent Claim
71 words
l0. A device as defined in Claim 9 wherein said frame comprises an upper frame half for supporting said at least one pair of the ion selective electrodes therein and provided with said pair of the liquid feed holes for feeding said reference solution and said sample solution independently of each other to said porous liquid distributing members, and a lower frame half for supporting said porous liquid distributing members therein.
Claim 14
Dependent Claim
69 words
A device as defined in Claim 9 wherein said frame comprises an upper frame half for supporting said porous liquid distributing members therein and provided with said pair of the liquid feed holes for feeding said reference solution and said sample solution independently of each other to said porous liquid distributing members, and a lower frame half for supporting said at least one pair of the ion selective electrodes.
Claim 15
Dependent Claim
43 words
A device as defined in Claim 9 wherein said porous bridge is disposed in a recess formed in the surface of said frame, and the depth of said recess is adjusted to a value not smaller than the height of said porous bridge.
Claim 16
Dependent Claim
163 words
An ionic activity measuring device comprising: i) at least one ion selective electrode pair composed of solid-state electrodes provided on their surfaces with ion selective layers selectively responding to a predetermined ion, ii) at least one pair of liquid distributing members for feeding a reference solution and a sample solution respectively to said ion selective layers of said ion selective electrode pair, iii) a frame for supporting therein said ion selective electrode pair and said liquid distributing members and provided with a pair of liquid feed holes for feeding said reference solution and said sample solution independently of each other to said liquid distributing members, and iv) a bridge for achieving electrical conduction between said reference solution and said sample solution fed to said pair of the liquid feed holes, wherein the improvement comprises providing said frame with potential measurement holes for allowing potential measuring probes to be inserted therethrough from the exterior to contact terminal sections of said ion selective electrode pair.
Claim 17
Dependent Claim
163 words
An ionic activity measuring device comprising: i) at least one ion selective electrode pair composed of solid-state electrodes provided on their surfaces with ion selective layers selectively responding to a predetermined ion, ii) at least one pair of liquid distributing members for feeding a reference solution and a sample solution respectively to said ion selective layers of said ion selective electrode pair, iii) a frame for supporting therein said ion selective electrode pair and said liquid distributing members and provided with a pair of liquid feed holes for feeding said reference solution and said sample solution independently of each other to said liquid distributing members, and iv) a bridge for achieving electrical conduction between said reference solution and said sample solution fed to said pair of the liquid feed holes, wherein the improvement comprises providing said frame with potential measurement holes for allowing potential measuring probes to be inserted therethrough from the exterior to contact terminal sections of said ion selective electrode pair.
Claim 18
Independent Claim
66 words
A device as defined in Claim l3 wherein said frame comprises an upper frame half for supporting said at least one ion selective electrode pair therein and provided with said pair of the liquid feed holes for feeding said reference solution and said sample solution independently of each other to said liquid distributing members, and a lower frame half for supporting said liquid distributing members therein.
Claim 19
Independent Claim
65 words
A device as defined in Claim l3 wherein said frame comprises an upper frame half for supporting said liquid distributing members therein and provided with said pair of the liquid feed holes for feeding said reference solution and said sample solution independently of each other to said liquid distributing members, and a lower frame half for supporting said at least one ion selective electrode pair.
Claim 20
Independent Claim
40 words
A device as defined in Claim l3 wherein said bridge is disposed in a recess formed in the surface of said frame, the depth of said recess is adjusted to a value not smaller than the height of said bridge.
Claim 21
Dependent Claim
178 words
An ionic activity measuring device comprising: i) at least one ion selective electrode pair composed of solid-state electrodes provided on their surfaces with ion selective layers selectively responding to a predetermined ion, ii) at least one pair of liquid distributing members for feeding a reference solution and a sample solution respectively to said ion selective layers of said ion selective electrode pair, iii) a frame for supporting therein said ion selective electrode pair and said liquid distributing members and provided with a pair of liquid feed holes for feeding said reference solution and said sample solution independently of each other to said liquid distributing members, and iv) a bridge for achieving electrical conduction between said reference solution and said sample solution fed to said pair of the liquid feed holes, wherein the improvement comprises providing a supporting section of said frame, where said frame supports said liquid distributing members, with air discharging holes for making said supporting section of said frame for said liquid distributing members communicate with the exterior at positions spaced from said liquid feed holes.
Claim 22
Dependent Claim
178 words
An ionic activity measuring device comprising: i) at least one ion selective electrode pair composed of solid-state electrodes provided on their surfaces with ion selective layers selectively responding to a predetermined ion, ii) at least one pair of liquid distributing members for feeding a reference solution and a sample solution respectively to said ion selective layers of said ion selective electrode pair, iii) a frame for supporting therein said ion selective electrode pair and said liquid distributing members and provided with a pair of liquid feed holes for feeding said reference solution and said sample solution independently of each other to said liquid distributing members, and iv) a bridge for achieving electrical conduction between said reference solution and said sample solution fed to said pair of the liquid feed holes, wherein the improvement comprises providing a supporting section of said frame, where said frame supports said liquid distributing members, with air discharging holes for making said supporting section of said frame for said liquid distributing members communicate with the exterior at positions spaced from said liquid feed holes.
Claim 23
Independent Claim
66 words
A device as defined in Claim l7 wherein said frame comprises an upper frame half for supporting said at least one ion selective electrode pair therein and provided with said pair of the liquid feed holes for feeding said reference solution and said sample solution independently of each other to said liquid distributing members, and a lower frame half for supporting said liquid distributing members therein.
Claim 24
Independent Claim
65 words
A device as defined in Claim l7 wherein said frame comprises an upper frame half for supporting said liquid distributing members therein and provided with said pair of the liquid feed holes for feeding said reference solution and said sample solution independently of each other to said liquid distributing members, and a lower frame half for supporting said at least one ion selective electrode pair.
Claim 25
Independent Claim
41 words
A device as defined in Claim l7 wherein said bridge is disposed in a recess formed in the surface of said frame, and the depth of said recess is adjusted to a value not smaller than the height of said bridge.
Claim 26
Dependent Claim
236 words
2l. An ionic activity measuring device comprising: i) at least three pairs of sheet-like ion selective electrodes provided with ion selective layers on their surfaces and electrically isolated from each other, ii) at least one pair of porous liquid distributing members for feeding a reference solution and a sample solution respectively to said ion selective layers of said ion selective electrodes, iii) a frame for housing said ion selective electrodes and said porous liquid distributing members therein and provided with a pair of liquid feed holes respectively disposed above said porous liquid distributing members for feeding said reference solution and said sample solution independently of each other to said porous liquid distributing members, and iv) a porous bridge for achieving electrical conduction between said reference solution and said sample solution fed to said pair of the liquid feed holes, said at least three pairs of the sheet-like ion selective electrodes being disposed to stand side by side along said porous liquid distributing members, and said pair of the liquid feed holes being disposed in the vicinity of the center between the ion selective electrode pair positioned at one end and the ion selective electrode pair adjacent to said ion selective electrode pair positioned at said one end, wherein the improvement comprises constituting said ion selective electrode pair adjacent to said ion selective electrode pair positioned at said one end, by a potassium ion selective electrode pair.
Claim 27
Dependent Claim
236 words
2l. An ionic activity measuring device comprising: i) at least three pairs of sheet-like ion selective electrodes provided with ion selective layers on their surfaces and electrically isolated from each other, ii) at least one pair of porous liquid distributing members for feeding a reference solution and a sample solution respectively to said ion selective layers of said ion selective electrodes, iii) a frame for housing said ion selective electrodes and said porous liquid distributing members therein and provided with a pair of liquid feed holes respectively disposed above said porous liquid distributing members for feeding said reference solution and said sample solution independently of each other to said porous liquid distributing members, and iv) a porous bridge for achieving electrical conduction between said reference solution and said sample solution fed to said pair of the liquid feed holes, said at least three pairs of the sheet-like ion selective electrodes being disposed to stand side by side along said porous liquid distributing members, and said pair of the liquid feed holes being disposed in the vicinity of the center between the ion selective electrode pair positioned at one end and the ion selective electrode pair adjacent to said ion selective electrode pair positioned at said one end, wherein the improvement comprises constituting said ion selective electrode pair adjacent to said ion selective electrode pair positioned at said one end, by a potassium ion selective electrode pair.
Claim 28
Independent Claim
64 words
A device as defined in Claim 2l wherein said frame comprises an upper frame half for supporting said ion selective electrodes therein and provided with said pair of the liquid feed holes for feeding said reference solution and said sample solution independently of each other to said porous liquid distributing members, and a lower frame half for supporting said porous liquid distributing members therein.
Claim 29
Independent Claim
63 words
A device as defined in Claim 2l wherein said frame comprises an upper frame half for supporting said porous liquid distributing members therein and provided with said pair of the liquid feed holes for feeding said reference solution and said sample solution independently of each other to said porous liquid distributing members, and a lower frame half for supporting said ion selective electrodes.
Claim 30
Independent Claim
43 words
A device as defined in Claim 2l wherein said porous bridge is disposed in a recess formed in the surface of said frame, and the depth of said recess is adjusted to a value not smaller than the height of said porous bridge.
References Cited (Backward Citations)
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