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A glucose sensor utilising tetracyanoquinodimethane as a mediator.
1Bioelectronics Division, Cranfield Institute of Technology, United Kingdom.
Hormone and Metabolic Research. Supplement Series
|January 1, 1988
Summary
This study presents a new amperometric enzyme electrode for glucose monitoring. The developed electrode uses tetracyanoquinodimethane as a mediator for accurate glucose detection within a clinically relevant range.
Area of Science:
- Electrochemistry
- Biosensors
- Analytical Chemistry
Background:
- Amperometric enzyme electrodes are crucial for glucose analysis.
- Efficient electron transfer is key for biosensor performance.
- Mediators play a vital role in facilitating electron transfer in enzyme electrodes.
Purpose of the Study:
- To describe a novel amperometric enzyme electrode for glucose analysis.
- To investigate the use of tetracyanoquinodimethane (TCNQ) as a mediator.
- To evaluate the electrode's performance in a clinically relevant glucose concentration range.
Main Methods:
- Fabrication of an amperometric enzyme electrode using pyrolytic graphite carbon.
- Utilisation of tetracyanoquinodimethane (TCNQ) as a redox mediator.
- Electrochemical characterization including direct current cyclic voltammetry.
- Assessment of electrode response to varying glucose concentrations, pH, and temperature.
Main Results:
- The electrode successfully detected glucose in the clinically relevant range of 0-70 mM.
- Tetracyanoquinodimethane (TCNQ) effectively facilitated electron transfer from glucose oxidase.
- The electrode's performance was characterized concerning its response to glucose, pH, and temperature variations.
Conclusions:
- The developed amperometric enzyme electrode with TCNQ mediator shows promise for glucose analysis.
- The electrode exhibits a suitable response range for clinical applications.
- Further characterization of pH and temperature effects provides insights for practical use.