Detoxification of Corn

Area of Science:

• Agricultural Science
• Food Science
• Toxicology

Background:

• Aflatoxins are toxic secondary metabolites produced by Aspergillus fungi.
• Contamination of food crops like corn with aflatoxins poses significant health risks.
• Effective detoxification strategies are crucial for food safety.

Purpose of the Study:

• To assess the efficacy of different chemical treatments for reducing aflatoxin levels in corn.
• To quantify the impact of these detoxification methods on corn's nutritional composition.

Main Methods:

• Cornmeal was prepared from aflatoxin-contaminated corn using a Wiley Mill and a 40-mesh sieve.
• Detoxification was performed using 3% hydrogen peroxide, 75% methanol, 5% dimethylamine hydrochloride, or 3% perchloric acid.
• Aflatoxin levels were determined using minicolumn tests.
• Fresh weight, protein, and lipid content were analyzed before and after treatment.

Main Results:

• All tested treatments significantly reduced aflatoxin levels to below 20 ppb.
• Hydrogen peroxide caused the highest fresh weight loss (28%), while methanol, dimethylamine hydrochloride, and perchloric acid resulted in 14%, 7%, and 7% loss, respectively.
• Losses in protein and lipids were minimal, not exceeding 0.5% and 0.6%, respectively.

Conclusions:

• Chemical treatments offer a viable method for detoxifying aflatoxin-contaminated corn.
• Dimethylamine hydrochloride and perchloric acid demonstrated high efficacy with minimal impact on corn's nutritional value.
• Further research is warranted to optimize these methods for large-scale application.