Tyrosinase-based ruthenium dispersed carbon paste biosensor for phenols

Area of Science:

• Electrochemistry
• Biosensor technology
• Analytical chemistry

Background:

• Phenolic compounds are widely found in nature and industry.
• Accurate detection of phenolic compounds is crucial for environmental monitoring and food safety.
• Existing biosensors often lack sufficient sensitivity and response speed.

Purpose of the Study:

• To develop highly sensitive biosensors for phenolic compounds.
• To investigate the use of metal-dispersed carbon paste matrices with tyrosinase.
• To enhance the electrocatalytic activity and detection capabilities of biosensors.

Main Methods:

• Incorporation of the enzyme tyrosinase into metal-dispersed carbon paste matrices.
• Utilizing ruthenium-doped carbon pastes for enhanced electrocatalytic activity.
• Employing flow injection analysis for rapid detection.
• Exploring the impact of various experimental variables on sensor performance.

Main Results:

• Ruthenium-doped carbon pastes demonstrated excellent electrocatalytic activity for quinone reduction.
• Highly sensitive detection of micromolar concentrations of phenolic compounds was achieved at 0.0 V (vs. Ag/AgCl).
• The developed biosensors exhibited greatly enhanced response compared to conventional carbon-paste tyrosinase biosensors.
• Fast, sensitive, and reproducible flow injection detection was successfully illustrated.
• Similar improvements were observed in tyrosinase-rich plant tissue electrodes.

Conclusions:

• Ruthenium-doped carbon paste matrices significantly enhance the performance of tyrosinase-based biosensors.
• These novel biosensors offer a promising platform for sensitive and rapid detection of phenolic compounds.
• The findings have implications for environmental analysis, food quality control, and other applications requiring phenolic compound quantification.