EP0154147A1
Expired / Lapsed
EP
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Apparatus for measuring ionic activity
Assignee: Fujifilm Holdings Corp
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Filing: 1985-01-25
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Granted: —
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Expires: 2005-01-25
Abstract
Abstract 57 An apparatus for measuring ionic activity is comprised of a rotatable turret (13A) and at least one pair of vertically movable probes (14A). The turret (13A) intermittently conveys slide-type ionic activity measuring devices, one by one, on each of which are spots of reference and sample solutions, to a measuring section where the probes (14A) come into contact with the measuring device so as to measure the potential difference corresponding to the difference in ionic activity of a specific ion between the reference and sample solutions. After measurement the turret (13A) further conveys the device to a discharging section (15) where the device is automatically discharged. The reference solution is preferably dripped through a nozzle (12C) connected to a reservoir (12A) when the measuring device is located at a position below the nozzle (12C).
Inventors
- 👤 Osamu Seshimoto
- 👤 Teruaki Koizumi
- 👤 Yoshio Saito
- 👤 Akira Yamaguchi
- 👤 Masaaki Terashima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 02:20
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/00029; G01N2035/00099; G01N2035/00138; G01N2035/00346; G01N2035/00356; G01N2035/00376
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
279 words
An apparatus for measuring ionic activity comprising: a means for supplying slide-type ionic activity measuring devices, one by one, each said measuring device having at least one pair of ion-selective electrodes, each of which generate a potential difference corresponding to the ionic activity of one specific ion, and a porous bridge disposed between the ion-selective layers of at least one pair of said ion-selective electrodes; a spotting means for spotting a substantially predetermined constant volume of a reference solution on one ion-selective layer of said pair of ion-selective electrodes of said measuring device; a spotting means for spotting a substantially predetermined constant volume of a sample solution on the other ion-selective layer of said pair of ion-selective electrodes of said measuring device, a first conveying means for conveying said measuring device to a measuring section after a sample solution is spotted on the other ion-selective layer of said pair of ion-selective electrodes; at least one pair of probes which come into contact with said measuring device so as to measure the potential difference between said pair of ion-selective electrodes; and a second conveying means for conveying said measuring device to a discharging section after the measurement; wherein said first and second conveying means consist of a turret which intermittently rotates while successively receiving said measuring devices one after the other; and said pair of probes is vertically movable in such that said probe assembly comes into electrical contact with said pair of ion-selective electrodes so as to measure the potential difference between the ion-selective electrodes when said measuring device is motionless on said turret, and then separates from the ion-selective electrodes before said turret makes its next intermittent move.
Claim 2
Independent Claim
279 words
An apparatus for measuring ionic activity comprising: a means for supplying slide-type ionic activity measuring devices, one by one, each said measuring device having at least one pair of ion-selective electrodes, each of which generate a potential difference corresponding to the ionic activity of one specific ion, and a porous bridge disposed between the ion-selective layers of at least one pair of said ion-selective electrodes; a spotting means for spotting a substantially predetermined constant volume of a reference solution on one ion-selective layer of said pair of ion-selective electrodes of said measuring device; a spotting means for spotting a substantially predetermined constant volume of a sample solution on the other ion-selective layer of said pair of ion-selective electrodes of said measuring device, a first conveying means for conveying said measuring device to a measuring section after a sample solution is spotted on the other ion-selective layer of said pair of ion-selective electrodes; at least one pair of probes which come into contact with said measuring device so as to measure the potential difference between said pair of ion-selective electrodes; and a second conveying means for conveying said measuring device to a discharging section after the measurement; wherein said first and second conveying means consist of a turret which intermittently rotates while successively receiving said measuring devices one after the other; and said pair of probes is vertically movable in such that said probe assembly comes into electrical contact with said pair of ion-selective electrodes so as to measure the potential difference between the ion-selective electrodes when said measuring device is motionless on said turret, and then separates from the ion-selective electrodes before said turret makes its next intermittent move.
Claim 3
Dependent Claim
31 words
An apparatus for measuring ionic activity as defined in Claim 1 wherein said first conveying means has a thermostatic means to maintain said measuring device at a constant temperature during motion.
Claim 4
Dependent Claim
54 words
An apparatus for measuring ionic activity as defined in Claim 1 wherein said turret consists of a disc at least a part of which forming said first conveying means is slidably rotatable in the vicinity of a thermostatic plate and in the periphery of which a plurality of measuring device receiving portions is formed.
Claim 5
Dependent Claim
64 words
An apparatus for measuring ionic activity as defined in Claim 1 wherein said turret consists of a disc a part of which forming said first and second conveying means is slidably rotatable on a thermostatic plate and in the periphery of which is formed a plurality of measuring device receiving portions, and said thermostatic plate has a discharging port formed at said discharging section.
Claim 6
Independent Claim
32 words
An apparatus for measuring ionic activity as defined in any of Claims 3 and 4 wherein the measuring device receiving portions are formed in the periphery of said turret at regular intervals.
Claim 7
Dependent Claim
34 words
An apparatus for measuring ionic activity as defined in Claim 1 wherein a guiding wall having a height not less than the thickness of said turret is formed around the rim of said turret.
Claim 8
Dependent Claim
54 words
An apparatus for measuring ionic activity as defined in Claim 1 wherein said supplying means comprises a slide holder and a pushing member, said slide holder containing a stack of said ionic activity measuring devices, and said pushing member pushing out said measuring devices, one by one, from the bottom of said slide holder.
Claim 9
Dependent Claim
71 words
An apparatus for measuring ionic activity as defined in Claim 1 which further comprises an operation and display section having an operation panel and a display section for indicating the output of said probes wherein said operation and display section is disposed in a housing so as to be viewable from the outside thereof, and said supplying means, said spotting means, said turret, and said probes are contained within said housing.
Claim 10
Dependent Claim
30 words
-9. An apparatus for measuring ionic activity as defined in Claim 8 wherein said housing has a cover which substantially shields said ionic activity measuring device from the ambient atmosphere.
Claim 11
Independent Claim
267 words
An apparatus for measuring ionic activity comprising: a means for supplying slide-type ionic activity measuring devices one by one, each said measuring device having at least one pair of ion-selective electrodes, each of which generate a potential difference corresponding to the ionic activity of one specific ion, and a porous bridge disposed between the ion-selective layers of at least one pair of said ion-selective electrodes; a spotting means for spotting a substantially predetermined constant volume of a reference solution on one ion-selective layer of said pair of ion-selective electrodes of said measuring device; a spotting means for spotting a substantially predetermined constant volume of a sample solution on the other ion-selective layer of said pair of ion-selective electrodes of said measuring device, a first conveying means for conveying said measuring device to a measuring section after a sample solution is spotted on the other ion-selective layer of said pair of ion-selective electrodes; at least one pair of probes which come into contact with said measuring device so as to measure the potential difference between said pair of ion-selective electrodes; and a second conveying means for conveying said measuring device to a discharging section after the measurement; wherein said spotting means is disposed in connection to a reservoir containing said reference solution and a spotting section of said measuring device, and comprises a dripping nozzle connected to said reservoir so as to drip said reference solution contained therein and a reference solution supplying means which supplies a predetermined constant volume of said reference solution from said reservoir through said nozzle when said measuring device stops below said nozzle.
Claim 12
Independent Claim
267 words
An apparatus for measuring ionic activity comprising: a means for supplying slide-type ionic activity measuring devices one by one, each said measuring device having at least one pair of ion-selective electrodes, each of which generate a potential difference corresponding to the ionic activity of one specific ion, and a porous bridge disposed between the ion-selective layers of at least one pair of said ion-selective electrodes; a spotting means for spotting a substantially predetermined constant volume of a reference solution on one ion-selective layer of said pair of ion-selective electrodes of said measuring device; a spotting means for spotting a substantially predetermined constant volume of a sample solution on the other ion-selective layer of said pair of ion-selective electrodes of said measuring device, a first conveying means for conveying said measuring device to a measuring section after a sample solution is spotted on the other ion-selective layer of said pair of ion-selective electrodes; at least one pair of probes which come into contact with said measuring device so as to measure the potential difference between said pair of ion-selective electrodes; and a second conveying means for conveying said measuring device to a discharging section after the measurement; wherein said spotting means is disposed in connection to a reservoir containing said reference solution and a spotting section of said measuring device, and comprises a dripping nozzle connected to said reservoir so as to drip said reference solution contained therein and a reference solution supplying means which supplies a predetermined constant volume of said reference solution from said reservoir through said nozzle when said measuring device stops below said nozzle.
Claim 13
Dependent Claim
31 words
An apparatus for measuring ionic activity as defined in Claim 10 wherein said first conveying means has a thermostatic means to maintain said measuring device at a constant temperature during motion.
Claim 14
Dependent Claim
19 words
An apparatus for measuring ionic activity as defined in Claim 10 wherein said spotting means comprises a peristaltic pump.
Claim 15
Dependent Claim
19 words
An apparatus for measuring ionic activity as defined in Claim 10 wherein said spotting means comprises a drip dispenser.
References Cited (Backward Citations)
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