Rapid Apta-Chromogenic Detection Method for Nitrofuran Metabolite Determination.

Area of Science:

• Analytical Chemistry
• Biotechnology
• Food Science

Background:

• Nitrofuran (NF) contamination poses a global food safety challenge, leading to import bans.
• Current detection methods can be time-consuming and lack sensitivity for critical NF metabolites.

Purpose of the Study:

• To develop a novel, rapid, and sensitive detection method for nitrofuran metabolites in food products.
• To utilize DNA aptamers and gold nanoparticles for a colorimetric assay.

Main Methods:

• Isolation of specific single-stranded DNA aptamers for nitrofuran metabolites (AOZ, AMOZ, AHD) using magnetic bead-SELEX.
• Development of a gold nanoparticle-based colorimetric assay for detecting these metabolites.
• Optimization of a rapid extraction method for food matrices like fish and honey.

Main Results:

• The apta-chromogenic method achieved a limit of detection (LOD) of 0.03 ppb for AOZ.
• Detection ranges were established for AOZ (0.01-0.06 ppb), AMOZ (0.06 ppb), and AHD (10 ppb).
• The optimized extraction method reduced sample preparation time to 3-6 hours.

Conclusions:

• The novel apta-chromogenic detection method offers high sensitivity for NF metabolites, meeting or exceeding minimum required performance limits (MPRL).
• This method provides a valuable tool for rapid screening of nitrofuran contamination in aquaculture products like shrimp and fish.
• The developed assay significantly shortens detection times, enhancing food safety surveillance.