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Electrochemical cell

a technology of electrochemical cells and electrodes, applied in the field of electrochemical cells, can solve the problems of affecting the process, affecting the operation, and the electrodes cannot reach the other electrodes, and achieve the effect of reducing the sample siz

Inactive Publication Date: 2006-11-16
LIFESCAN INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a biosensor for determining the concentration of a component in an aqueous liquid sample. The biosensor includes an electrochemical cell with two electrically resistive substrates separated by a sheet including an aperture. The cell also includes a socket region with contact areas for electrical communication. The biosensor may also include a measuring circuit with a tongue plug and an automated instrument for detecting an electrical signal. The invention also provides an apparatus for determining the concentration of a reduced form or an oxidized form of a redox species in a liquid sample. The technical effects of the invention include improved accuracy and sensitivity in the determination of component concentrations in aqueous liquid samples and the ability to detect the reduced form or oxidized form of a redox species.

Problems solved by technology

Generally this method requires sufficient separation of the electrodes so that electrolysis products at one electrode cannot reach the other electrode and interfere with the processes at the other electrode during the period of measurement.
Firstly, sample size required is greater than desirable.

Method used

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Examples

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Embodiment Construction

[0056] The construction of a thin layer electrochemical cell will now be described by G way of example of the improved method of manufacture. C

[0057] Step 1: A sheet 1 of Melinex® (a chemically inert, and electrically resistive Polyethylene Terephthalate [“PET”]) approximately 13 cm×30 cm and 100 micron thick was laid flat on a sheet of release paper 2 and coated using a Number 2 MYAR bar to a thickness of 12 microns wet (approximately 2-5 microns dry) with a water-based heat activated adhesive 3 (ICI Novacoat system using catalyst:adhesive). The water was then evaporated by means of a hot air dryer leaving a contact adhesive surface. The sheet was then turned over on a release paper and the reverse side was similarly coated with the same adhesive 4, dried, and a protective release paper 5 applied to the exposed adhesive surface. The edges were trimmed to obtain a sheet uniformly coated on both sides with tacky contact adhesive protected by release paper.

[0058] Step 2: The sheet w...

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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.

Description

RELATED APPLICATIONS [0001] This application is a continuation of copending U.S. application Ser. No. 09 / 709,968, filed Nov. 10, 2000, which is a continuation of copending U.S. application Ser. No. 09 / 314,251, filed May 19, 1999, which issued as U.S. Pat. No. 6,174,420 on Jan. 16, 2001, which is a continuation of copending U.S. application Ser. No. 09 / 068,828, filed on May 15, 1998, and of copending U.S. application Ser. No. 08 / 852,804, filed on May 7, 1997, which issued as U.S. Pat. No. 5,942,102 on Aug. 24, 1999, the contents of which are incorporated herein by reference in their entirety.FIELD OF THE INVENTION [0002] This invention relates to an electrochemical cell for determining the concentration of an analyte in a carrier. BACKGROUND OF THE INVENTION [0003] The invention herein described is an improvement in or modification of the invention described in our co-pending U.S. application Ser. No. 08 / 981,385, entitled ELECTROCHEMICAL CELL, filed on Dec. 18, 1997, the contents of ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G01N27/26G01N33/487C12Q1/00G01N27/30G01N27/403G01N27/49
CPCC12Q1/004G01N27/3272C12Q1/006
Inventor HODGES, ALASTAIR MCINDOEBECK, THOMAS WILLIAMJOHANSEN, ODDVARMAXWELL, IAN ANDREW
Owner LIFESCAN INC
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