| http://www.w3.org/ns/prov#value | - The present invention provides such a method based on the above-mentioned electrochemical principle for measuring the glucose concentration in a sample of an aqueous medium, e.g. a sample of body fluid, such as a sample of whole blood, blood plasma, serum, urine or saliva, but the sensor electrode(s) has/have a composition and a structure which ensure that the charge-transfer mediator is present a
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