Click Reactions: A Paradigm Shift in Food Chemical Residue Testing

Area of Science:

• Analytical Chemistry
• Biosensor Technology
• Food Safety Science

Background:

• Chemical residues (pesticides, antibiotics, hormones) in food present global health risks.
• Existing detection methods (chromatography, immunoassays) have limitations in sensitivity, complexity, and on-site application.
• Click chemistry offers a promising alternative for rapid, specific, and ultrasensitive residue detection.

Purpose of the Study:

• To review the principles and applications of click chemistry in developing advanced biosensors for food safety.
• To evaluate recent click chemistry-based sensor designs and their optimization strategies.
• To address challenges and explore future directions for click chemistry in food contaminant analysis.

Main Methods:

• Review of click chemistry principles, classifications, and reaction characteristics.
• Integration of click chemistry with biosensor platforms for enhanced detection.
• Analysis of sensor design strategies including probe functionalization and nanomaterial engineering.
• Evaluation of advanced transduction mechanisms and methods to overcome matrix interference.

Main Results:

• Click chemistry enables selective, mild, and modular reactions for sensitive analyte detection.
• Click chemistry-based biosensors demonstrate potential for rapid, ultrasensitive, and on-site screening of food contaminants.
• Strategies like molecular imprinting and AI refinement address challenges such as matrix effects and reagent stability.

Conclusions:

• Click chemistry-based biosensors represent a significant advancement in food safety analysis.
• Future work should focus on green chemistry, multiplexing, and expanding applications to emerging contaminants.
• These innovations pave the way for scalable, next-generation analytical tools for enhanced food safety standards.