Optimization of a glucose biosensor setup based on a Ni/Al HT matrix.

Area of Science:

• Electrochemistry
• Materials Science
• Biotechnology

Background:

• Amperometric biosensors are crucial for glucose monitoring.
• Developing stable and sensitive enzyme immobilization matrices is key.
• Hydrotalcite (HT) materials offer potential as enzyme supports.

Purpose of the Study:

• To develop and optimize an amperometric glucose biosensor using a Ni/Al-NO3 hydrotalcite matrix.
• To investigate the impact of electrodeposition parameters on biosensor performance.
• To achieve high sensitivity and reproducibility for glucose detection.

Main Methods:

• Electrochemical synthesis of Ni/Al-NO3 HT matrix on a platinum electrode.
• Immobilization of glucose oxidase (GOx) within the HT matrix.
• Optimization using experimental design (full factorial) considering enzyme concentration and Ni/Al molar ratio.
• Cross-linking with glutaraldehyde for enzyme stabilization.

Main Results:

• Optimized electrodeposition conditions significantly improved biosensor sensitivity.
• Enzyme concentration (linear and quadratic effects) and its interaction with Ni/Al ratio were significant factors.
• The optimized biosensor demonstrated excellent reproducibility with a relative standard deviation (RSD) of 5% for sensitivity.

Conclusions:

• The developed Ni/Al-NO3 HT matrix is a suitable support for glucose oxidase immobilization.
• Electrochemical synthesis parameters critically influence glucose biosensor performance.
• The optimized biosensor shows promise for accurate and reliable glucose monitoring.