Membrane electrode for measuring the glucose concentration in fluids
First Claim
1. A membrane electrode for measuring the level of glucose concentration in a liquid, comprising:
- a base membrane having a first side, at least one noble metal electrode on said first side of the base membrane, a proton-selective ion membrane on the base membrane and the noble metal electrode, and a double membrane which is arranged on the ion membrane and in which glucose oxidase is contained in a suitable medium.
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Abstract
The present invention concerns a membrane electrode for measuring glucose concentration in liquids, comprising: a base membrane with at least one noble metal electrode which is arranged on one side of the base membrane; a proton-selective ion membrane arranged on the base membrane and the noble metal electrode; and a double membrane which is arranged on the ion membrane and in which glucose oxidase is contained in a suitable medium, and also an electronic circuit for operation of the membrane electrode comprising: a stabilised polarisation voltage source; two high-impedance amplifiers; a parallel resistor; an element for processing and storage of the measured parameter; and an output means.
94 Citations
31 Claims
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1. A membrane electrode for measuring the level of glucose concentration in a liquid, comprising:
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a base membrane having a first side, at least one noble metal electrode on said first side of the base membrane, a proton-selective ion membrane on the base membrane and the noble metal electrode, and a double membrane which is arranged on the ion membrane and in which glucose oxidase is contained in a suitable medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
an outer membrane enclosing the insulating membrane, the base membrane with the electrode and the proton-selective ion membrane, wherein the double membrane is arranged on the outer membrane.
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4. A membrane electrode as set forth in claim 3, including:
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an intermediate space between the insulating membrane, the base membrane with the electrode, the proton-selective ion membrane and the outer membrane; and
an electrolyte gel filling said intermediate space.
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5. A membrane electrode as set forth in claim 1, wherein the base membrane is arranged on a carrier foil.
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6. A membrane electrode as set forth in claim 5, further comprising:
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an outer membrane enclosing a carrier foil, the base membrane with the electrode and the proton-selective ion membrane, wherein the double membrane is arranged on the outer membrane.
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7. A membrane electrode as set forth in claim 6, including:
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an intermediate space between the carrier foil, the base membrane with the electrode, the proton-selective ion membrane and the outer membrane; and
an electrolyte gel filling said intermediate space.
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8. A membrane electrode as set forth in claim 1, wherein an insulating membrane laterally encloses the electrode structure.
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9. A membrane electrode as set forth in claim 1, wherein a carrier foil laterally encloses the electrode structure.
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10. A membrane electrode as set forth in claim 1, further comprising:
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an outer membrane enclosing the base membrane with the electrode and the proton-selective ion membrane, wherein the double membrane is arranged on the outer membrane.
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11. A membrane electrode as set forth in claim 10, further comprising:
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an outer membrane enclosing the base membrane with the noble metal electrode and the proton-selective ion membrane;
a cable for connection of said noble metal electrode to an electronic measuring arrangement; and
a hose extending from the electrode membrane structure and accommodating the cable, the hose being attached to the outer membrane.
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12. A membrane electrode as set forth in claim 11, including:
an intermediate space between the cable and the hose filled with an electrolyte gel.
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13. A membrane electrode as set forth in claim 11, wherein the hose is welded to the outer membrane.
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14. A membrane electrode as set forth in claim 11, wherein the hose is glued to the outer membrane.
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15. A membrane electrode as set forth in claim 1, further comprising:
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a cable for connection of said noble metal electrode to an electronic measuring arrangement; and
a hose extending from the electrode membrane structure and accommodating the cable.
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16. A membrane electrode as set forth in claim 15, including:
an intermediate space between the cable and the hose filled with an electrolyte gel.
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17. A membrane electrode as set forth in claim 1, wherein the electrode comprises gold.
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18. A membrane electrode as set forth in claim 1, wherein the electrode comprises platinum.
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19. A membrane electrode as set forth in claim 1, wherein the ion membrane contains a liquid phase, and wherein ligand molecules are contained in the liquid phase.
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20. A membrane electrode as set forth in claim 19, wherein the ligand molecules are tridodecylamine.
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21. A membrane electrode as set forth in claim 11, further comprising:
a thermal sensor in the electrode structure.
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22. A membrane electrode as set forth in claim 1, wherein the electrode structure has a plurality of measuring locations.
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23. A membrane electrode as set forth in claim 22, wherein the measuring locations comprise noble metal electrodes.
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24. A membrane electrode as set forth in claim 1, including:
a holding means on which the electrode structure is arranged.
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25. A membrane electrode as set forth in claim 24, wherein the holding means is adapted to be fitted on to at least one tooth.
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26. A membrane electrode as set forth in claim 24, wherein the holding means is formed by a clamp.
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27. A membrane electrode as set forth in claim 1, further comprising:
a pad in which the electrode structure is arranged, direct contact of the glucose oxidase-containing double membrane with the surrounding medium being ensured.
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28. A membrane electrode as set forth in claim 27, wherein the pad is of silicone rubber.
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29. A membrane electrode as set forth in claim 1, wherein the electrode arrangement is provided in a capillary.
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30. A membrane electrode as set forth in claim 1, wherein the electrode arrangement is coupled to a capillary.
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31. A membrane electrode as set forth in claim 1, wherein the base membrane is formed by a plastic fiber, and the electrode, the proton-selective ion membrane and the glucose oxidase-containing double membrane enclose the plastic fiber.
Specification