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Degradation kinetics of aflatoxin B1 and B2 in solid medium by using pulsed light irradiation

Wang, Bei, Mahoney, Noreen E, Khir, Ragab, Wu, Bengang, Zhou, Cunshan, Pan, Zhongli, Ma, Haile
Journal of the science of food and agriculture 2018 v.98 no.14 pp. 5220-5224
aflatoxin B1, aflatoxin B2, irradiation, kinetics, light, models
BACKGROUND: Pulsed light (PL) is a new potential technology to degrade aflatoxin. The objective of this study was to investigate the degradation characters of aflatoxin B₁ (AFB₁) and B₂ (AFB₂) treated under PL irradiation. A kinetic degradation study of AFB₁ and AFB₂ in solid medium was performed under PL irradiation at different initial concentrations of AFB₁ (229.9, 30.7 and 17.8 μg kg⁻¹) and AFB₂ (248.2, 32.2 and 19.5 μg kg⁻¹) and irradiation intensities (2.86, 1.60 and 0.93 W cm⁻²) of PL. A second‐order reaction model was applied to describe degradation of AFB₁ and AFB₂. RESULTS: The results showed that the degradation of AFB₁ and AFB₂ followed the second‐order reaction kinetic model well (R² > 0.97). The degradation rate was proportional to the intensities of PL irradiation and the initial concentrations of aflatoxins. CONCLUSION: It is concluded that the degradation of AFB₁ and AFB₂ with the use of PL could be accurately described using the second‐order reaction kinetic model. © 2018 Society of Chemical Industry