Enzyme Electrode

 

Enzyme-Based/ Biochemical Electrode:

 Enzyme electrodes are operated based on the principle that an enzyme reacts with a specific substance, and the product of this reaction is detected by a true ion-selective electrode.

The enzyme is mobilized at the surface of the electrode.

Enzyme electrodes definitely are not true ion-selective electrodes but usually are considered within the ion-specific electrode topic.

All these reactions occur inside a special membrane that covers the true ion-selective electrode, which is why enzyme electrodes sometimes are considered ion-selective. An example is glucose-selective electrodes.

Glucose electrodes are described for the specific and sensitive determination of glucose in the blood. The probes are based on the conversion of  B-D-glucose by glucose oxidase chemically deposited to the surface of a Platinum electrode.