Electrochemical cell
First Claim
1. A biosensor for use in determining a concentration of a component in an aqueous liquid sample, the biosensor comprising:
- (a) an electrochemical cell, the electrochemical cell comprising a first electrically resistive substrate having a first thin layer of a first electrically conductive material on a first face, a second electrically resistive substrate having a second thin layer of a second electrically conductive material on a second face, the substrates being disposed with the first electrically conductive material facing the second electrically conductive material and being separated by a sheet comprising an aperture, the wall of which aperture cooperates with the electrically conductive materials to define a cell wall, and wherein the aperture defines a working electrode area in the cell, the cell further comprising a sample introduction aperture whereby the aqueous liquid sample may be introduced into the cell; and
(b) a measuring circuit.
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Accused Products
Abstract
A biosensor for use in determining a concentration of a component in an aqueous liquid sample is provided including: an electrochemical cell having a first electrically resistive substrate having a thin layer of electrically conductive material, a second electrically resistive substrate having a thin layer of electrically conductive material, the substrates being disposed with the electrically conductive materials facing each other and being separated by a sheet including an aperture, the wall of which aperture defines a cell wall and a sample introduction aperture whereby the aqueous liquid sample may be introduced into the cell; and a measuring circuit.
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Citations
32 Claims
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1. A biosensor for use in determining a concentration of a component in an aqueous liquid sample, the biosensor comprising:
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(a) an electrochemical cell, the electrochemical cell comprising a first electrically resistive substrate having a first thin layer of a first electrically conductive material on a first face, a second electrically resistive substrate having a second thin layer of a second electrically conductive material on a second face, the substrates being disposed with the first electrically conductive material facing the second electrically conductive material and being separated by a sheet comprising an aperture, the wall of which aperture cooperates with the electrically conductive materials to define a cell wall, and wherein the aperture defines a working electrode area in the cell, the cell further comprising a sample introduction aperture whereby the aqueous liquid sample may be introduced into the cell; and
(b) a measuring circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A biosensor for use in determining a concentration of a component in an aqueous liquid sample, the biosensor comprising:
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(a) a thin layer electrochemical cell, the cell comprising;
(i) an electrically resistive sheet comprising an aperture wherein the aperture defines a working electrode area in the cell;
(ii) a first electrode layer covering the aperture on a first side of the sheet;
(iii) a second electrode layer covering the aperture on a second side of the sheet; and
(iv) a passage for admission into the aperture of the aqueous liquid sample; and
(b) a measuring circuit. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An apparatus for determining a concentration of a reduced form or an oxidized form of a redox species in a liquid sample, the apparatus comprising:
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(a) a hollow electrochemical cell having a working electrode and a counter or counter/reference electrode wherein the working electrode is spaced from the counter or counter/reference electrode by less than 500 μ
m;
(b) means for applying an electric potential difference between the electrodes; and
(c) means for electrochemically determining the concentration of the reduced form or the oxidized form of the redox species in the liquid sample. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A method for determining a concentration of a reduced form or an oxidized form of a redox species in a liquid sample, the method comprising:
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(a) providing a hollow electrochemical cell having a working electrode and a counter or counter/reference electrode wherein the working electrode is spaced from the counter or counter/reference electrode by less than 500 μ
m;
(b) applying an electric potential difference between the electrodes; and
(c) electrochemically determining the concentration of the reduced form or the oxidized form of the redox species in the liquid sample. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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Specification