Electrochemical sensor with sample pre-treatment function
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United States of America Patent
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Issued Date -
Nov 25, 2004
app pub date -
May 20, 2003
filing date -
May 20, 2003
priority date (Note) -
Abandoned
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Abstract
An electrochemical sensor with sample pretreatment function includes an insulating substrate, and an electrode system disposed on the substrate having at least a working electrode and a reference electrode. An electrically insulating layer partially covers the electrode system, so an exposed area of the electrode system not covered by the electrically insulting layer forms an electrochemical electrode reaction region that accommodates sample solution and an air vent. A reaction layer is disposed in the electrochemical electrode reaction region and includes at least an oxidoreductase, an electron mediator, and at least a carrier. A pretreatment membrane layer is disposed on the reaction layer of the electrode reaction region, which is capable of physically or chemically treating the sample solution, such that the sample solution is pretreated through the pretreatment membrane layer of the sensor and enters the electrochemical electrode reaction region covered with the reaction layer to undergo reaction with the oxidoreductase and the electron mediator.
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