EP0212612A2
Expired / Lapsed
EP
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Method and device of measuring ion activity
Assignee: Fujifilm Holdings Corp
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Filing: 1986-08-18
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Granted: —
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Expires: 2006-08-18
Abstract
Abstract In a method of measuring ion activity of a liquid sample comprising steps of spotting a reference liquid and the liquid sample on surfaces of ion-selective membranes, respectively, of at least a pair of ion-selective electrode sheets which is electrically insulated from each other, said ion-selective membranes being provided on the top of said ion-selective electrode sheets; and measuring a potential difference between the ion-selective electrodes under the conditions that both liquids are electrically connected to each other by a bridge, the improvement wherein: said each ion-selective electrode sheet is arranged upside down in such a manner that the ion-selective membrane is positioned on the lowest side; and said each liquid spotted from the upper side is temporarily conveyed downwardly to the lower level than the surface of the ion-selective membrane or the spotting is done on the lower level than the surface of the ion-selective membrane, and then conveyed upwardly to the surface of the ion-selective membrane through an upward passage which has a side wall being clear of the surface of the ion-selective membrane under the condition that no capillary phenomenon occurs in the clearance between the top of said side wall and the surface of the ion-selective membrane, so as to reach the surface of the ion-selective membrane.
Inventors
- 👤 Osamu Seshimoto
- 👤 Yoshio Saito
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 03:23
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/307
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
221 words
A method of measuring ion activity of a liquid sample comprising steps of spotting a reference liquid and the liquid sample on surfaces of ion-selective membranes, respectively, of at least a pair of ion-selective electrode sheets which are electrically insulated from each other, said ion-selective membranes being arranged on the top of said ion-selective electrode sheets; and measuring a potential difference between said both ion-selective electrodes under the condition that said both liquids are electrically connected to each other by a bridge, which is characterized in that: said each ion-selective electrode sheet is arranged upside down in such a manner that the ion-selective membrane is positioned on the lowest side; and said each liquid spotted from the upper side is temporarily conveyed downwardly to the lower level than the surface of the ion-selective membrane or said spotting of each liquid is done on the lower level than the surface of the ion-selective membrane, and then said liquid is conveyed upwardly to the surface of the ion-selective membrane through an upward passage which has a side wall being clear of the surface of the ion-selective membrane provided under the condition that no capillary phenomenon occurs within the clearance between the top of said side wall and the surface of the ion-selective membrane, so as to reach the surface of the ion-selective membrane.
Claim 2
Independent Claim
221 words
A method of measuring ion activity of a liquid sample comprising steps of spotting a reference liquid and the liquid sample on surfaces of ion-selective membranes, respectively, of at least a pair of ion-selective electrode sheets which are electrically insulated from each other, said ion-selective membranes being arranged on the top of said ion-selective electrode sheets; and measuring a potential difference between said both ion-selective electrodes under the condition that said both liquids are electrically connected to each other by a bridge, which is characterized in that: said each ion-selective electrode sheet is arranged upside down in such a manner that the ion-selective membrane is positioned on the lowest side; and said each liquid spotted from the upper side is temporarily conveyed downwardly to the lower level than the surface of the ion-selective membrane or said spotting of each liquid is done on the lower level than the surface of the ion-selective membrane, and then said liquid is conveyed upwardly to the surface of the ion-selective membrane through an upward passage which has a side wall being clear of the surface of the ion-selective membrane provided under the condition that no capillary phenomenon occurs within the clearance between the top of said side wall and the surface of the ion-selective membrane, so as to reach the surface of the ion-selective membrane.
Claim 3
Dependent Claim
51 words
The method of measuring ion activity as claimed in claim 1, wherein said each liquid on the lower level than the surface of the ion-selective membrane is conveyed horizontally to a position just below the surface of the ion-selective membrane, and then conveyed upwardly to the surface of the ion-selective membrane.
Claim 4
Dependent Claim
55 words
The method of measuring ion activity as claimed in claim 1, wherein said each liquid on the lower level than the surface of the ion-selective membrane is conveyed horizontally via a porous distributor to a position just below the surface of the ion-selective membrane, and then conveyed upwardly to the surface of the ion-selective membrane.
Claim 5
Dependent Claim
33 words
The method of measuring ion activity as claimed in claim 1, wherein at least partial conveyance of said each liquid in the upward direction is performed in the presence of a porous distributor.
Claim 6
Independent Claim
181 words
A device for measuring ion activity in a liquid sample comprising at least a pair of ion-selective electrode sheets having ion-selective membranes on the top portion, liquid-guiding portions for guiding a reference liquid and a liquid sample to each surface of said ion-selective membranes, respectively, and a bridge for electrically connecting both liquids to each other, which is characterized in that: said each ion-selective electrode sheet is arranged upside down in such a manner that the ion-selective membrane is postioned on the lowest side; and said each liquid-guiding portion comprises a liquid-receiving opening for supplying the liquid to the lower level than the surface of the ion-selective membrane, a horizontal passage for conveying the liquid in the horizontal direction to a position just below the surface of the ion-selective membrane, and an upward passage for conveying said liquid to the surface of the ion-selective membrane, said upward passage having a side wall being clear of provided under the condition that no capillary phenomenon occurs in the clearance between the top of said side wall and the surface of the ion-selective membrane.
Claim 7
Independent Claim
181 words
A device for measuring ion activity in a liquid sample comprising at least a pair of ion-selective electrode sheets having ion-selective membranes on the top portion, liquid-guiding portions for guiding a reference liquid and a liquid sample to each surface of said ion-selective membranes, respectively, and a bridge for electrically connecting both liquids to each other, which is characterized in that: said each ion-selective electrode sheet is arranged upside down in such a manner that the ion-selective membrane is postioned on the lowest side; and said each liquid-guiding portion comprises a liquid-receiving opening for supplying the liquid to the lower level than the surface of the ion-selective membrane, a horizontal passage for conveying the liquid in the horizontal direction to a position just below the surface of the ion-selective membrane, and an upward passage for conveying said liquid to the surface of the ion-selective membrane, said upward passage having a side wall being clear of provided under the condition that no capillary phenomenon occurs in the clearance between the top of said side wall and the surface of the ion-selective membrane.
Claim 8
Dependent Claim
21 words
The device for measuring ion activity as claimed in claim 5, wherein said horizontal passage is provided with a porous distributor.
Claim 9
Dependent Claim
26 words
The device for measuring ion activity as claimed in claim 5, wherein at least a portion of said upward passage is provided with a porous distributor.
Claim 10
Dependent Claim
28 words
The device for measuring ion activity as claimed in claim 5, wherein space provided on the upper side against said upward passage is provided with a porous distributor.
Claim 11
Dependent Claim
38 words
The device for measuring ion activity as claimed in claim 5, wherein space provided on the upper side against said upward passage is open to the outside of the device through a passage other than the upward passage.
Claim 12
Dependent Claim
141 words
The device for measuring ion activity as claimed in claim 5, wherein said ion-selective electrode sheet is settled in a container comprising a top frame having opening portions which are located to correspond to each liquid receiving opening, an upper middle frame having opening portions which are located to correspond to each liquid receiving opening and to the upper opening of the upward passage, said opening portions corresponding to the upper opening of the upward passage being larger than said upper opening to avoid being in contact with the liquid, a water-impermeable lower middle frame having opening portions which are located to correspond to the downward and upward passages, and a bottom frame having a groove for forming the horizontal passage; and said bridge is fixed onto the top frame so as to traverse the opening portions of the top frame.
Claim 13
Dependent Claim
160 words
The device for measuring ion activity as claimed in claim 5, wherein said ion-selective electrode sheet is settled in a container comprising a top frame having opening portions which are located to correspond to each liquid receiving opening, a bridge-supporting member having opening portions which are located to correspond to the opening portions of the top frame, an upper middle frame having opening portions which are located to correspond to each liquid receiving opening and to the upper opening of the upward passage, said opening portions corresponding to the upper opening of the upward passage being larger than said upper opening to avoid being in contact with the liquid, a water-impermeable lower middle frame having opening portions which are located to correspond to the downward and upward passages, and a bottom frame having a groove for forming the horizontal passage; and said bridge is fixed onto the bridge-supporting member so as to traverse the opening portions of the bridge-supporting member.
Claim 14
Dependent Claim
139 words
The device for measuring ion activity as claimed in claim 5, wherein said ion-selective electrode sheet is settled in a container comprising a top frame having opening portions which are located to correspond to each liquid receiving opening, a bridge-supporting member having opening portions which are located to correspond to each liquid receiving opening and to the upper opening of the upward passage, said opening portions corresponding to the upper opening of the upward passage being larger than said upper opening to avoid being in contact with the liquid, a water-impermeable middle frame having opening portions which are located to correspond to the downward and upward passages, and a bottom frame having a groove for forming the horizontal passage; and said bridge is fixed onto the bridge-supporting member so as to traverse the opening portions of the bridge-supporting member.
Claim 15
Independent Claim
244 words
A device for measuring ion activity in a liquid sample comprising at least a pair of ion-selective electrode sheets having ion-selective membranes on the top. portion, liquid-guiding portions for guiding a reference liquid and a liquid sample to each surface of said ion-selective membranes, respectively, and a bridge for electrically connecting both liquids to each other, which is characterized in that: said each ion-selective electrode sheet is arranged upside down in such a manner that the ion-selective membrane is postioned on the lowest side; and said each liquid-guiding portion comprises a liquid receiving opening for supplying the liquid to the lower level than the surface of the ion-selective membrane, a horizontal passage for conveying the liquid in the horizontal direction to the position just below the surface of the ion-selective membrane, an upward passage for conveying said liquid to the surface of the ion-selective membrane, said upward passage having a side wall being clear of the surface of the ion-selective membrane under the condition that no capillary phenomenon occurs in a clearance between the top of said side wall and the surface of the ion-selective membrane, and a spotting guide passage provided on the upper side against the upward passage, said spotting guide passage having both functions of guiding the liquid to the surface of the ion-selective membrane and of preventing the liquid which has reached the surface of the ion-selective membrane from spreading to the side of the ion-selective membrane along said surface.
Claim 16
Independent Claim
244 words
A device for measuring ion activity in a liquid sample comprising at least a pair of ion-selective electrode sheets having ion-selective membranes on the top. portion, liquid-guiding portions for guiding a reference liquid and a liquid sample to each surface of said ion-selective membranes, respectively, and a bridge for electrically connecting both liquids to each other, which is characterized in that: said each ion-selective electrode sheet is arranged upside down in such a manner that the ion-selective membrane is postioned on the lowest side; and said each liquid-guiding portion comprises a liquid receiving opening for supplying the liquid to the lower level than the surface of the ion-selective membrane, a horizontal passage for conveying the liquid in the horizontal direction to the position just below the surface of the ion-selective membrane, an upward passage for conveying said liquid to the surface of the ion-selective membrane, said upward passage having a side wall being clear of the surface of the ion-selective membrane under the condition that no capillary phenomenon occurs in a clearance between the top of said side wall and the surface of the ion-selective membrane, and a spotting guide passage provided on the upper side against the upward passage, said spotting guide passage having both functions of guiding the liquid to the surface of the ion-selective membrane and of preventing the liquid which has reached the surface of the ion-selective membrane from spreading to the side of the ion-selective membrane along said surface.
Claim 17
Dependent Claim
21 words
The device for measuring ion activity as claimed in claim 13, wherein said horizontal passage is provided with a porous distributor.
Claim 18
Dependent Claim
32 words
The device for measuring ion activity as claimed in claim 13, wherein said spotting guide passage is open to the outside of the device through a passage other than the upward passage.
Claim 19
Dependent Claim
162 words
The device for measuring ion activity as claimed in claim 13, wherein said ion-selective electrode sheet is settled in a container comprising a top frame having opening portions which are located to correspond to each liquid receiving opening, an upper middle frame having opening portions which are located to correspond to each liquid receiving opening and to the upper opening of the upward passage, said opening portions corresponding to the upper opening of the upward passage being larger than said upper opening to avoid being in contact with the liquid, a water-impermeable lower middle frame having opening portions which are located to correspond to the downward and upward passages, said water-impermeable lower middle frame also having the spotting guide passage provided on said opening portions corresponding to the upward passages, and a bottom frame having a groove for forming the horizontal passage; and said bridge is fixed onto the top frame so as to traverse the opening portions of the top frame.
Claim 20
Dependent Claim
181 words
The device for measuring ion activity as claimed in claim 13, wherein said ion-selective electrode sheet is settled in a container comprising a top frame having opening portions which are located to correspond to each liquid receiving opening, a bridge-supporting member having opening portions which are located to correspond to the opening portions of the top frame, an upper middle frame having opening portions which are located to correspond to each liquid receiving opening and to the upper opening of the upward passage, said opening portions corresponding to the upper opening of the upward passage being larger than said upper opening to avoid being in contact with the liquid, a water-impermeable lower middle frame having opening portions which are located to correspond to the downward and upward passages, said water-impermeable lower middle frame also having the spotting guide passage provided on said opening portions corresponding to the upward passages, and a bottom frame having a groove for forming the horizontal passage; and said bridge is fixed onto the bridge-supporting member so as to traverse the opening portions of the bridge-supporting member.
Claim 21
Dependent Claim
159 words
The device for measuring ion activity as claimed in claim 13, wherein said ion-selective electrode sheet is settled in a container comprising a top frame having opening portions which are located to correspond to each liquid receiving opening, a bridge-supporting member having opening portions which are located to correspond to each liquid receiving opening and to the upper opening of the upward passage, said opening portions corresponding to the upper opening of the upward passage being larger than said upper opening to avoid being in contact with the liquid, a water-impermeable middle frame having opening portions which are located to correspond to the downward and upward passages, said water-impermeable middle frame also having the spotting guide passage provided on said opening portions corresponding to the upward passages, and a bottom frame having a groove for forming the horizontal passage; and said bridge is fixed onto the bridge-supporting member so as to traverse the opening portions of the bridge-supporting member.
Claim 22
Independent Claim
264 words
A device for measuring ion activity in a liquid sample comprising at least a pair of ion-selective electrode sheets having ion-selective membranes on the top portion, liquid-guiding portions for guiding a reference liquid and a liquid sample to each surface of said ion-selective membranes, respectively, and a bridge for electrically connecting both liquids to each other, which is characterized in that: said each ion-selective electrode sheet is arranged upside down in such a manner that the ion-selective membrane is postioned on the lowest side; and said each liquid-guiding portion comprises a liquid receiving opening for supplying the liquid to the lower level than the surface of the ion-selective membrane, a horizontal passage for conveying the liquid in the horizontal direction to the position just below the surface of the ion-selective membrane, an upward passage for conveying said liquid to the surface of the ion-selective membrane, said upward passage having a side wall being clear of the surface of the ion-selective membrance under the condition that no capillary phenomenon occurs in the clearance between the top of said side wall and the surface of the ion-selective membrane, and a spotting guide passage provided on the upper side against the upward passage, said spotting guide passage having both functions of guiding the liquid to the surface of the ion-selective membrane and of preventing the liquid which has reached the surface of the ion-selective membrane from spreading to the side of the ion-selective membrane along said surface, the top of side wall of said spotting guide passage being in contact with the surface of the ion-selective membrane.
Claim 23
Independent Claim
264 words
A device for measuring ion activity in a liquid sample comprising at least a pair of ion-selective electrode sheets having ion-selective membranes on the top portion, liquid-guiding portions for guiding a reference liquid and a liquid sample to each surface of said ion-selective membranes, respectively, and a bridge for electrically connecting both liquids to each other, which is characterized in that: said each ion-selective electrode sheet is arranged upside down in such a manner that the ion-selective membrane is postioned on the lowest side; and said each liquid-guiding portion comprises a liquid receiving opening for supplying the liquid to the lower level than the surface of the ion-selective membrane, a horizontal passage for conveying the liquid in the horizontal direction to the position just below the surface of the ion-selective membrane, an upward passage for conveying said liquid to the surface of the ion-selective membrane, said upward passage having a side wall being clear of the surface of the ion-selective membrance under the condition that no capillary phenomenon occurs in the clearance between the top of said side wall and the surface of the ion-selective membrane, and a spotting guide passage provided on the upper side against the upward passage, said spotting guide passage having both functions of guiding the liquid to the surface of the ion-selective membrane and of preventing the liquid which has reached the surface of the ion-selective membrane from spreading to the side of the ion-selective membrane along said surface, the top of side wall of said spotting guide passage being in contact with the surface of the ion-selective membrane.
Claim 24
Dependent Claim
21 words
The device for measuring ion activity as claimed in claim 19, wherein said horizontal passage is provided with a porous distributor.
Claim 25
Dependent Claim
125 words
The device for measuring ion activity as claimed in claim 19, wherein said ion-selective electrode sheet is settled in a container comprising a top frame having opening portions which are located to correspond to each liquid receiving opening, a water-impermeable middle frame having opening portions which are located to correspond to the downward and upward passages, said opening portions corresponding to the upward passages having a step inside so as to make the diameter of the upper opening of the upward passage larger than that of the lower opening of the upward passage, and a bottom frame having a groove for forming the horizontal passage; and said bridge is fixed onto the top frame so as to traverse the opening portions of the top frame.
Claim 26
Dependent Claim
144 words
The device for measuring ion activity as claimed in claim 19, wherein said ion-selective electrode sheet is settled in a container comprising a top frame having opening portions which are located to correspond to each liquid receiving opening, a bridge-supporting member having opening portions which are located to correspond to the opening portions of the top frame, a water-impermeable middle frame having opening portions which are located to correspond to the downward and upward passages, said opening portions corresponding to the upward passages having a step inside so as to make the diameter of the upper opening of the upward passage larger than that of the lower opening of the upward passage, and a bottom frame having a groove for forming the horizontal passage; and said bridge is fixed onto the bridge-supporting member so as to traverse the opening portions of the bridge-supporting member.
References Cited (Backward Citations)
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