CA1093641A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Ion-selective electrode
Assignee: Eastman Kodak Co
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Filing: 1977-04-25
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Granted: 1981-01-13
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Expires: 1997-04-25
Abstract
Abstract ION-SELECTIVE ELECTRODE Abstract of the Disclosure A dry-operative ion-selective electrode which requires no preconditioning prior to use in an ion-sensing operation comprises: (a) a dried, reference electrode comprising either a metal/metal salt reference half-cell or multiple-layer redox couple; and (b) in contact with the reference electrode, a hydrophobic ion-selective membrane comprising a binder having dispersed therein a solution of an ion carrier dissolved in a suitable carrier solvent.
Inventors
- 👤 Charles J. Battaglia
- 👤 Jack C. Chang
- 👤 Daniel S. Daniel
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-03 05:12
CPC Classifications
—
Claims Analysis
Total Claims: 59
Claim 1
Independent Claim
54 words
A dry-operative ion-selective electrode com-prising: (a) a dried internal reference electrode; and (b) in contact with the reference electrode a hydrophobic ion-selective membrane of predetermined uniform thickness in regions thereof intended for contact with a sample for analysis, said membrane comprising a binder having distributed therein an ion carrier dissolved in a carrier solvent.
Claim 2
Dependent Claim
54 words
A dry-operative ion-selective electrode com-prising: (a) a dried internal reference electrode; and (b) in contact with the reference electrode a hydrophobic ion-selective membrane of predetermined uniform thickness in regions thereof intended for contact with a sample for analysis, said membrane comprising a binder having distributed therein an ion carrier dissolved in a carrier solvent.
Claim 3
Dependent Claim
20 words
The electrode of claim 1 further including a support, said reference electrode being disposed between said support and said membrane.
Claim 4
Dependent Claim
12 words
The electrode of claim 2 wherein said support comprises a polymeric material.
Claim 5
Dependent Claim
20 words
The electrode of claim 3 wherein said polymeric material is a cellulose acetate, poly(ethylene terephthalate), a polycarbonate or a polystyrene.
Claim 6
Dependent Claim
56 words
The electrode of claim 1 wherein said binder comprises a polymer selected from the group consisting of polyvinyl chloride, a polyurethane, carboxylated polyvinyl chloride, polymethine, a copolymer of poly(vinyl chloride) and poly(vinyl acetate), a silicone elastomer, a polycarbonate, a cellulose ester, a copolymer of polyvinyl chloride and polyvinylidene chloride, polyvinyl butyral, polyvinyl formal and polyvinyl alcohol.
Claim 7
Dependent Claim
100 words
The electrode of claim 1 wherein said ion carrier is selected from the group consisting of valinomycin, a cyclic polyether, tetraphenyl borate, a tetralactone, a macrolide acetone, a cyclic polypeptide, a quarternary ammonium salt, a compound of the formula wherein: I R1 : -CH3 R2 : -(CH2)n-COO-CH2-CH3 wherein n = 1 or 10 II R1 : -CH3 R2 : _(CH2)6-CH3 III R1 = R2 : -CH2-CH2-CH3 IV R1 : -CH2-CH2-CH3 R2 : -CH2-C-(CH3)3 V R' = R2 : VI R1 = R2 : - CH2 Compounds of the following structural formulas Cis and Trans wherein: a) R = CH2CON(CH2CH2CH3)2 b)
Claim 8
Dependent Claim
25 words
The electrode of claim 1 wherein said ion carrier solvent is selected from the group consisting of aromatic ethers, aliphatic ethers, phthalates, adipates and sebacates.
Claim 9
Dependent Claim
23 words
The electrode of claim 1 wherein the weight ratio of said carrier solvent to said binder ranges from about 1:1 to about 5:2.
Claim 10
Dependent Claim
58 words
A dry-operative ion selective electrode com-prising: (a) a dried internal reference electrode comprising a metal/metal salt reference electrode; and b) in contact with the reference electrode a hydrophobic ion-selective membrane of predetermined uniform thickness in regions intended for contact with a sample for analysis said membrane com-prising an ion carrier and a carrier solvent distributed in a binder.
Claim 11
Dependent Claim
58 words
A dry-operative ion selective electrode com-prising: (a) a dried internal reference electrode comprising a metal/metal salt reference electrode; and b) in contact with the reference electrode a hydrophobic ion-selective membrane of predetermined uniform thickness in regions intended for contact with a sample for analysis said membrane com-prising an ion carrier and a carrier solvent distributed in a binder.
Claim 12
Dependent Claim
58 words
The electrode of claim 9 wherein said metal/ metal salt reference electrode comprises a conducting layer of a metal in contact with a layer of an insoluble salt of said metal, and a dried electrolyte layer comprising a hydrophilic matrix having dissolved therein a water soluble salt having as an anion the anion of said metal salt layer.
Claim 13
Dependent Claim
13 words
The electrode of claim 10 wherein said hydrophilic matrix is a polymeric material.
Claim 14
Dependent Claim
32 words
The electrode of claim 11 wherein said hydrophilic matrix comprises a member selected from the group consisting of polyvinyl alcohol, gelatin, agarose, polyacrylamide, polyvinyl pyrrolidone, polyhydroxyethyl methacrylate, poly-(hydroxyethyl acrylate) and polyacrylic acid.
Claim 15
Dependent Claim
18 words
The electrode of claim 9 wherein said layer of insoluble salt comprises a halide salt of said metal.
Claim 16
Dependent Claim
71 words
The electrode of claim 11 further including a support which comprises an electrically insulating polymeric film, said conducting metal layer comprises silver, said layer of insoluble salt comprises a halide salt of silver, and said hydrophobic membrane comprises poly(vinyl chloride) and ion carrier selected from the group consisting of valinomycin and tetraphenyl boron and said carrier solvent is selected from the group consisting of cyclic ethers, sebacates, phthalates, adepates and phosphates.
Claim 17
Dependent Claim
56 words
A dry-operative ion-selective electrode com-prising: (a) a dried redox internal reference electrode; and (b) in contact with the reference electrode a hydrophobic, ion-selective membrane of predetermined uniform thickness in a region thereof intended for contact with a sample for analysis, said membrane comprising a hydrophobic binder having distributed therein an ion carrier and a carrier solvent.
Claim 18
Dependent Claim
56 words
A dry-operative ion-selective electrode com-prising: (a) a dried redox internal reference electrode; and (b) in contact with the reference electrode a hydrophobic, ion-selective membrane of predetermined uniform thickness in a region thereof intended for contact with a sample for analysis, said membrane comprising a hydrophobic binder having distributed therein an ion carrier and a carrier solvent.
Claim 19
Dependent Claim
31 words
The electrode of claim 15 wherein said dried redox electrode comprises a solid, electrically conducting layer and a compatible redox couple which are in electro-chemical contact upon wetting of the electrode.
Claim 20
Dependent Claim
23 words
The electrode of claim 16 wherein said con-ducting layer comprises a conductor selected from the group consisting of carbon, platinum, gold and nickel.
Claim 21
Dependent Claim
10 words
The electrode of claim 17 wherein said conductor is carbon.
Claim 22
Dependent Claim
16 words
The electrode of claim 16 wherein said conducting layer comprises a particulate conductor and a binder.
Claim 23
Dependent Claim
12 words
The electrode of claim 19 wherein said particulate conductor is particulate carbon.
Claim 24
Dependent Claim
12 words
The electrode of claim 19 wherein said binder comprises a hydrophilic polymer.
Claim 25
Dependent Claim
24 words
The electrode of claim 21 wherein said hydrophilic polymer is selected from the group consisting of gelatin, polyvinyl alcohol, polyacrylic acid and poly(vinyl pyrrolidone).
Claim 26
Dependent Claim
15 words
The electrode of claim 16 further comprising a support having said solid conducting layer thereon.
Claim 27
Dependent Claim
33 words
The electrode of claim 16 wherein said redox couple comprises a material, a portion of which is in a first oxidation state and a portion of which is in a second oxidation state.
Claim 28
Dependent Claim
15 words
The electrode of claim 24 wherein the molar ratio of said Portions is about 1.
Claim 29
Dependent Claim
14 words
The electrode of claim 24 wherein said redox couple comprises iron or cobalt complexes.
Claim 30
Dependent Claim
19 words
The electrode of claim 26 wherein said iron or cobalt complexes comprise, respectively, ferri/ferrocyanide ions and cobaltic/cobaltous terpyridyl ions.
Claim 31
Dependent Claim
33 words
The electrode of claim 16 wherein said binder comprises a polymer selected from the group consisting of polyvinyl chloride, polymethine, copolymers of poly(vinyl chloride) and poly(vinyl acetate), silicone elastomers, polycarbonates and cellulose esters.
Claim 32
Dependent Claim
88 words
The electrode of claim 16 wherein said ion carrier is valinomycin, cyclic polyether, tetraphenyl borate, tetralactones, macrolide acetones, cyclic polypeptides and a compound of the formula wherein: I R1 : -CH3 R2 : -(CH2)n-COO-CH2-CH3 wherein n = 1 or 10 II R1 : -CH3 R2 : -(CH2)6-CH3 III R1 = R2 : -CH2-CH2-CH3 IV R1 : -CH2-CH2-CH3 R2 : -CH2-C-(CH3)3 V R' = R2 : VI R1 = R2 : -CH2 or a compound of the following structural formulas Cis and Trans wherein: a) R = CH2CON(CH2CH2CH3)2 b)
Claim 33
Dependent Claim
24 words
The electrode of claim 16 wherein said ion carrier solvent is selected from the group consisting of aromatic and aliphatic ethers, phthalates and sebacates.
Claim 34
Dependent Claim
23 words
The electrode of claim 16 wherein the weight ratio of said carrier solvent to said binder ranges from about 1:1 to about 5:2.
Claim 35
Dependent Claim
87 words
A dry-operative ion-selective electrode com-prising: (a) a dried redox internal reference electrode comprising an electrically conducting layer and a layer containing a compatible redox couple, said conducting layer and said redox couple are in electro-chemical contact upon wetting of the electrode; and (b) in conducting contact with the internal reference electrode, a hydrophobic ion-selective membrane comprising a binder having distributed therein an ion carrier dissolved in a carrier solvent, said membrane being of relatively uni-form thickness in regions thereof intended for contact with a sample for analysis.
Claim 36
Dependent Claim
87 words
A dry-operative ion-selective electrode com-prising: (a) a dried redox internal reference electrode comprising an electrically conducting layer and a layer containing a compatible redox couple, said conducting layer and said redox couple are in electro-chemical contact upon wetting of the electrode; and (b) in conducting contact with the internal reference electrode, a hydrophobic ion-selective membrane comprising a binder having distributed therein an ion carrier dissolved in a carrier solvent, said membrane being of relatively uni-form thickness in regions thereof intended for contact with a sample for analysis.
Claim 37
Dependent Claim
17 words
The electrode of claim 32 wherein said layer containing the compatible redox couple further comprises a binder.
Claim 38
Dependent Claim
32 words
The electrode of claim 33 wherein said binder comprises a hydrophilic polymer selected from the group consisting of gelatin, polyvinyl alcohol, poly(vinyl pyrrolidone), agarose, polyacrylamide, hydroxyethyl acrylate, hydroxyethyl methacrylate and polyacrylic acid.
Claim 39
Dependent Claim
23 words
The electrode of claim 32 wherein said conducting layer comprises a conductor selected from the group consisting of carbon, platinum, gold and nickel.
Claim 40
Dependent Claim
10 words
The electrode of claim 35 wherein said conductor is carbon.
Claim 41
Dependent Claim
16 words
The electrode of claim 32 wherein said conducting layer comprises a particulate conductor and a binder.
Claim 42
Dependent Claim
12 words
The electrode of claim 37 wherein said particulate conductor is particulate carbon.
Claim 43
Dependent Claim
12 words
The electrode of claim 37 wherein said binder comprises a hydrophilic polymer.
Claim 44
Dependent Claim
30 words
The electrode of claim 37 wherein said hydro-philic polymer is selected from the group consisting of gelatin, polyvinyl alcohol, poly(vinyl pyrrolidone), agarose, polyacrylamide, hydroxyethyl acrylate, hydroxyethyl methacrylate and polyacrylic acid.
Claim 45
Dependent Claim
15 words
The electrode of claim 32 further comprising a support having said solid conducting layer thereon.
Claim 46
Dependent Claim
54 words
The electrode of claim 32 wherein said redox couple comprises a material a portion of which is in a first oxidation state and a portion of which is in a second oxidation state and the ratio of the concentration of the portion of said material in each of said oxidation states is about 1.
Claim 47
Dependent Claim
27 words
The electrode of claim 32 wherein said redox couple comprises iron ions in each of two oxidation states or cobalt ions in each of two oxidation states.
Claim 48
Dependent Claim
21 words
The electrode of claim 43 wherein said redox couple is selected from the group consisting of ferri/ferro-cyanide and cobaltic/cobaltous terpyridyl ions.
Claim 49
Dependent Claim
116 words
A dry-operative ion-selective electrode com-prising a support and disposed on said support in order of proximity to the support (a) a dried internal reference electrode com-prising (1) a conducting layer comprising particulate carbon dispersed in a hydrophilic polymeric binder; and (2) a redox couple layer comprising a compatible redox couple in a hydro-philic binder said redox couple coming into electrochemical contact with said particulate carbon upon wetting of the electrode; and (b) in conducting contact with the internal reference electrode a hydrophobic ion-selective membrane of relatively uniform thickness in regions thereof intended for contact with a sample for analysis and comprising a hydrophobic binder having distributed therein an ion carrier dissolved in an ion carrier solvent.
Claim 50
Dependent Claim
116 words
A dry-operative ion-selective electrode com-prising a support and disposed on said support in order of proximity to the support (a) a dried internal reference electrode com-prising (1) a conducting layer comprising particulate carbon dispersed in a hydrophilic polymeric binder; and (2) a redox couple layer comprising a compatible redox couple in a hydro-philic binder said redox couple coming into electrochemical contact with said particulate carbon upon wetting of the electrode; and (b) in conducting contact with the internal reference electrode a hydrophobic ion-selective membrane of relatively uniform thickness in regions thereof intended for contact with a sample for analysis and comprising a hydrophobic binder having distributed therein an ion carrier dissolved in an ion carrier solvent.
Claim 51
Dependent Claim
21 words
The electrode of claim 45 wherein said polymer is selected from the group consisting of gelatin, polyvinyl alcohol and poly(vinyl pyrrolidone).
Claim 52
Dependent Claim
33 words
The electrode of claim 45 wherein said redox couple comprises a material a portion of which in in a first oxidation state and a portion of which is in a second oxidation state.
Claim 53
Dependent Claim
14 words
The electrode of claim 45 wherein said redox couple comprises iron or cobalt complexes.
Claim 54
Dependent Claim
16 words
49- The electrode of claim 48 wherein said complexes comprise respectively ferri/ferrocyanide and cobaltic/cobaltous terpyridyl ions.
Claim 55
Dependent Claim
156 words
A planar, dry-operative ion-selective electrode comprising: (a) a dried metal/metal salt internal reference electrode comprising (1) a conducting layer of a metal, (2) a layer of an insoluble salt of the metal of the conducting layer, and (3) a dried electrolyte solution layer having a thickness of from about 0.1 to about 0.5 mil and comprising a hydrophilic binder having dissolved therein from about 1.40 to about 2.5 g/m2 of a water soluble salt having as anion the ion of said metal salt layer, said conducting layer in contact with said layer of insoluble salt, and (b) in contact with said electrolyte layer a hydrophobic ion-selective membrane having a predetermined uniform thickness of less than about 5 mil and comprising at least about .1 g/m2 of an ion carrier dissolved in an ion carrier solvent dispersed in a binder the weight ratio of said carrier solvent to said binder ranging from about 1:1 to about 5:2.
Claim 56
Dependent Claim
156 words
A planar, dry-operative ion-selective electrode comprising: (a) a dried metal/metal salt internal reference electrode comprising (1) a conducting layer of a metal, (2) a layer of an insoluble salt of the metal of the conducting layer, and (3) a dried electrolyte solution layer having a thickness of from about 0.1 to about 0.5 mil and comprising a hydrophilic binder having dissolved therein from about 1.40 to about 2.5 g/m2 of a water soluble salt having as anion the ion of said metal salt layer, said conducting layer in contact with said layer of insoluble salt, and (b) in contact with said electrolyte layer a hydrophobic ion-selective membrane having a predetermined uniform thickness of less than about 5 mil and comprising at least about .1 g/m2 of an ion carrier dissolved in an ion carrier solvent dispersed in a binder the weight ratio of said carrier solvent to said binder ranging from about 1:1 to about 5:2.
Claim 57
Dependent Claim
17 words
The electrode of claim 50 wherein the thickness of said dry electrolyte layer is about 0.2 mil.
Claim 58
Dependent Claim
28 words
The electrode of claim 50 wherein said membrane comprises from about .3 to about .5 g/m2 of said ion carrier and has a thickness of about 1 mil.
Claim 59
Dependent Claim
26 words
The electrode of claim 1 wherein the thickness of said membrane varies at most about 20% in regions intended for contact with a sample for analysis.
References Cited (Backward Citations)
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