Glucose in blood glucose undergoes an oxidation-reduction reaction with ferricyanide catalyzed by glucose oxidase (GOD), producing gluconic acid and potassium ferrocyanide. Potassium ferrocyanide undergoes an electrochemical reaction, generating an oxidation-reduction current. The magnitude of the oxidation-reduction current is proportional to the glucose concentration in the blood. The glucose concentration in the blood can be obtained by detecting the magnitude of the oxidation-reduction current by a blood glucose meter.
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