Methods and apparatus for electrochemical measurements

Electrolysis: processes – compositions used therein – and methods – Electrolytic analysis or testing – For corrosion

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205697, 422 69, 422 8201, G01N 2726

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active

056457090

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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