Mini-column screening assay for tetracyclines in chicken

Area of Science:

• Food Science
• Analytical Chemistry
• Public Health

Background:

• Tetracyclines (TCs) are antibiotics used in livestock.
• Monitoring TC residues in food products is crucial for public health.
• Existing detection methods can be complex or time-consuming.

Purpose of the Study:

• To develop a simple, rapid, reliable, and economical method for detecting tetracycline residues in chicken meat.
• To establish a pre-screening technique for public health laboratories.

Main Methods:

• Development of a mini-column (MC) method using a Pasteur pipette packed with silica gel and anhydrous sodium sulfate.
• Detection of TCs via a golden yellow fluorescent band under UV light.
• Quantification based on band intensity and comparison with standards.

Main Results:

• The MC method achieved a limit of detection (LOD) of 1 ng, enabling detection of 10 µg TCs/kg chicken meat.
• The method demonstrated specificity, with no overlap between analyte and impurities.
• Blind sample evaluations confirmed the method's accuracy for levels at or below permissible limits.

Conclusions:

• The developed mini-column method is a viable alternative to microbial screening assays for tetracycline detection.
• This technique offers an effective and economical pre-screening tool for food safety analysis.
• The method's simplicity and reliability make it suitable for public health laboratories.