Kinetic modelling of aflatoxins B₁ conversion and validation in corn, rice, and peanut during thermal treatments
2011
Zhang, Chao | Ma, Yue | Zhao, Xiaoyan | Zeng, Yali | Wang, Fen
A kinetic model of the aflatoxins B₁ conversion was plotted and validated successfully in the aflatoxin B₁-contaminated rice during thermal treatments. Specifically, the kinetic Model A and Model B of the aflatoxin B₁ conversion were plotted based on the differential-scanning calorimetry and thermogravimetric analysis, respectively, with the pure aflatoxin B₁. In succession, Model A and Model B were validated in the aflatoxin B₁-contaminated corn, rice, and peanut during thermal treatments. Model A successfully simulated the conversion of aflatoxin B₁ in the aflatoxin B₁-contaminated rice with the correlation coefficients of 0.859 and average-absolute deviation of 6.61. The activation energy and conversion order of the aflatoxin B₁ conversion were 89.0kJ/mol and 0.12, respectively. Moreover, the relationships between the conversion degree and time vs temperature were plotted based on Model A. These plots would help to predict the final content of aflatoxin B₁ after thermal treatments, and give an instruction to develop a food processing.
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