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Related Experiment Videos

Manual sorting to eliminate aflatoxin from peanuts.

F C F Galvez1, M L D L Francisco, B J Villarino

  • 1Department of Food Science and Nutrition, College of Home Economics, University of the Philippines Diliman, Quezon City 1101, Philippines.

Journal of Food Protection
|October 24, 2003
PubMed
Summary

A manual sorting method effectively removes aflatoxin contamination from peanuts. Blanching and deskinning facilitate manual sorting, yielding aflatoxin-free or low-aflatoxin peanuts, ensuring food safety.

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Area of Science:

  • Agricultural Science
  • Food Science
  • Food Safety

Background:

  • Aflatoxins are toxic secondary metabolites produced by certain fungi, posing significant health risks.
  • Peanut contamination with aflatoxins is a global concern, impacting food safety and trade.
  • Effective methods are needed to reduce aflatoxin levels in contaminated peanut supplies.

Purpose of the Study:

  • To develop and verify an efficient manual sorting procedure for eliminating aflatoxin contamination in peanuts.
  • To assess the effectiveness of blanching and deskinning in facilitating manual aflatoxin removal.
  • To confirm the capability of the sorting process across varying levels of initial contamination.

Main Methods:

  • Development of a manual sorting protocol involving blanching and deskinning.

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  • Testing the procedure on raw peanuts with high initial aflatoxin levels (300 ppb).
  • Verification of aflatoxin levels in sorted peanuts using analytical methods.

    • Main Results:

    • Manual sorting after blanching (140°C, 25 min) and deskinning effectively removed aflatoxin-contaminated kernels.
    • Peanuts initially contaminated at 300 ppb were rendered aflatoxin-free after sorting.
    • Sorted peanuts consistently showed no detectable or low (<15 ppb) aflatoxin levels.
    • The process proved effective for both extensive and moderate contamination levels.
    • Commercial-scale sorting (50 kg) using dry blanching (45-55 min) also facilitated effective contamination removal.

    Conclusions:

    • Manual sorting, combined with blanching and deskinning, is a viable strategy for reducing aflatoxin contamination in peanuts.
    • The developed procedure is effective in producing aflatoxin-free or significantly reduced aflatoxin-containing peanut products.
    • This method offers a practical approach to enhance peanut safety at both laboratory and commercial scales.