A Low-cost and Enzyme-free Glucose Paper Sensor

Area of Science:

• Electrochemistry
• Materials Science
• Biomedical Engineering

Background:

• Traditional glucose test strips often rely on enzymes, which can be costly and unstable.
• Accurate and affordable glucose monitoring is crucial for effective diabetes management.
• Developing non-enzymatic glucose sensors offers a promising avenue for improved diagnostics.

Purpose of the Study:

• To develop and evaluate a low-cost, enzyme-free paper sensor for glucose detection.
• To utilize molecularly imprinted polyaniline (MIP-PANI) as an electrode material for non-enzymatic glucose sensing.
• To assess the sensor's performance using impedance spectroscopy for routine glucose testing.

Main Methods:

• Fabrication of a paper-based sensor with a MIP-PANI electrode.
• Measurement of impedance changes in the sensor upon dispensing blood samples.
• Analysis of impedance ratio versus glucose concentration using linear and polynomial regression.
• Determination of the sensor's limit of detection (LoD).

Main Results:

• The MIP-PANI paper sensor demonstrated a limit of detection (LoD) of 1.135 mM for glucose.
• Impedance changes correlated with glucose concentrations, enabling quantitative analysis.
• The sensor provided a reliable method for non-enzymatic glucose determination.

Conclusions:

• The developed enzyme-free glucose paper sensor is a viable, low-cost alternative to conventional glucose test strips.
• This novel sensor technology has the potential to enhance the quality of routine glucose testing for diabetic individuals.
• The non-enzymatic approach offers a stable and cost-effective solution for glucose monitoring.