Decontamination of aflatoxin B1 in peanuts using various cooking methods

Manisha Dhanshetty, Christopher T. Elliott, Kaushik Banerjee*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Peanut and its processed products are recurrently contaminated with aflatoxins (AFs) which are of potential public health concern. Among the different types of AFs, Aflatoxin B1 (B1) is the most frequently detected in peanuts over the maximum level (ML), and thus has warranted considerable research interest in the domain of food safety. In this study, we investigated the decontamination of B1 in three naturally-incurred lots (4, 12, and 40 µg/kg) of peanuts by a range of cooking treatments, including frying, pressure cooking, and roasting. B1 concentrations were determined by ultra-high performance liquid chromatography- fluorescence detection. The method provided a limit of quantification of 0.25 µg/kg for B1, which was much lower than any of its national and international MLs. The recoveries of B1 in fresh and cooked peanuts (positive-control) were in the range of 90–100%. Overall, all the cooking methods demonstrated a significant reduction in B1 loads. The degree to which the processing methods reduced the B1 content followed the pattern: roasting with a combination of NaCl and citric acid > pressure-cooking with a combination of NaCl and citric acid > frying. As the cooking procedures did not involve any complicated steps or sophisticated equipment, these could be readily adopted for decontamination or reduction in the level of B1 for a safer consumption of peanuts at the household level without affecting the organoleptic properties.

Original languageEnglish
JournalJournal of food science and technology
Early online date04 Sep 2020
DOIs
Publication statusEarly online date - 04 Sep 2020

Keywords

  • Aflatoxin B1
  • Decontamination by cooking
  • Fluorescence detection
  • P eanut
  • Ultra-high performance liquid chromatography

ASJC Scopus subject areas

  • Food Science

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