Methods and apparatus for electrochemical measurements
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United States of America Patent
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Jul 8, 1997
Grant Date -
N/A
app pub date -
Dec 7, 1994
filing date -
Dec 8, 1993
priority date (Note) -
Expired
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Abstract
A method for the electrochemical determination of the reducing sugars content of an aqueous solution in a thin layer electrochemical measuring device, preferably a capillary fill device, wherein an inner surface of the device is coated with a soluble redox mediator, the device including means for producing an alkaline environment within the device. In a preferred method the redox mediator comprises potassium ferricyanide providing ferricyanide ions in saturated solution and lithium hydroxide providing hydroxide ions in an excess amount of from 1 to 3 molar. The invention also provides a capillary fill device having a guard electrode between the reference and working electrodes.
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