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Related Experiment Videos

Application of immunoaffinity columns to mycotoxin analysis

P M Scott1, M W Trucksess

  • 1Health Canada, Health Protection Branch, Food Research Division, Sir Frederick G. Banting Research Centre, Ottawa, ON, Canada.

Journal of AOAC International
|November 5, 1997
PubMed
Summary

Immunoaffinity columns (IACs) provide effective cleanup and isolation of mycotoxins from food and biological samples. These columns enable sensitive detection of toxins like aflatoxins and ochratoxin A at very low levels.

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Area of Science:

  • Analytical Chemistry
  • Food Safety
  • Biochemistry

Background:

  • Immunoaffinity columns (IACs) are crucial for mycotoxin analysis in food and biological samples.
  • IACs utilize specific antibodies immobilized on a solid support for selective toxin capture.
  • Commonly targeted mycotoxins include aflatoxins, ochratoxin A, and fumonisins.

Purpose of the Study:

  • To review the application and methodology of immunoaffinity columns for mycotoxin analysis.
  • To highlight the effectiveness of IACs in sample cleanup and analyte concentration.
  • To discuss the availability and validation of commercial IACs for various mycotoxins.

Main Methods:

  • Antibodies specific to mycotoxins are immobilized onto activated solid-phase supports.
  • Mycotoxins bind to antibodies in the sample extract, while impurities are washed away.

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  • Elution with a miscible solvent (e.g., methanol) releases the purified mycotoxin for detection.
  • Further separation and quantitation are achieved using liquid chromatography (LC) or fluorometry.

    • Main Results:

    • IACs facilitate the cleanup and isolation of mycotoxins from complex matrices.
    • Commercial IACs are available for multiple mycotoxins, including aflatoxins, ochratoxin A, and fumonisins.
    • Validated methods using IACs, like Aflatest P, achieve low part-per-trillion detection limits.
    • Regeneration and reuse of IACs have been explored for economic viability.

    Conclusions:

    • Immunoaffinity chromatography is a powerful technique for sensitive and selective mycotoxin determination.
    • IACs enable the analysis of mycotoxins in various food and biological samples with high efficiency.
    • The development and commercial availability of IACs have significantly advanced mycotoxin testing capabilities.