Portable Infrared Laser Spectroscopy for On-site Mycotoxin Analysis

Area of Science:

• Food safety and analytical chemistry
• Spectroscopic analysis of contaminants
• Mycotoxin detection technologies

Background:

• Mycotoxins contaminate food and feed, posing significant human health risks, including cancer.
• Accurate and rapid detection of mycotoxins like deoxynivalenol and aflatoxin B1 is crucial for food trade and processing.
• Existing laboratory-based chromatography methods are unsuitable for on-site analysis, necessitating new approaches.

Purpose of the Study:

• To introduce MYCOSPEC, a novel spectroscopic method for on-site mycotoxin contamination analysis.
• To demonstrate the capability of mid-infrared tunable quantum cascade laser (QCL) spectroscopy for detecting mycotoxins at EU regulatory levels.
• To enable direct, rapid mycotoxin analysis for food commodity importers and processors.

Main Methods:

• Utilized mid-infrared tunable quantum cascade laser (QCL) spectroscopy combined with GaAs/AlGaAs thin-film waveguides.
• Applied multivariate data mining strategies, specifically principal component analysis (PCA), for data analysis.
• Validated the technique on deoxynivalenol in maize and wheat, and aflatoxin B1 in peanuts.

Main Results:

• Achieved classification of deoxynivalenol-contaminated samples at the EU regulatory limit of 1250 μg kg⁻¹.
• Successfully classified aflatoxin B1-affected peanut samples at the EU regulatory limit of 8 μg kg⁻¹.
• Demonstrated the feasibility of on-site spectroscopic mycotoxin detection meeting regulatory standards.

Conclusions:

• MYCOSPEC offers a groundbreaking spectroscopic solution for rapid, on-site mycotoxin detection.
• The developed method successfully identifies deoxynivalenol and aflatoxin B1 contamination at EU regulatory limits.
• This technology has the potential to significantly enhance food safety protocols and streamline trade processes.