Electrochemical test device and related methods
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United States of America Patent
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Mar 28, 2006
Grant Date -
Jun 12, 2003
app pub date -
Aug 21, 2002
filing date -
Jun 17, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electrochemical test device is provided for determining the presence or concentration of an analyte in an aqueous fluid sample. The electrochemical test device includes a working electrode and a counter electrode made of an amorphous semiconductor material. The working electrode is overlaid with a reagent capable of reacting with an analyte to produce a measurable change in potential which can be correlated to the concentration of the analyte in the fluid sample. The test device optionally contains a reference electrode made of an amorphous semiconductor material having a reference material on the reference electrode. The test device electrodes can be constructed on a flexible film substrate, such as a polymeric film or a metal foil coated with a non-conductive coating.
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