Efficiency and safety evaluation of photodegradation of Aflatoxin B_1 on peanut surface

摘要

A photodegradation study of Aflatoxin B_1 (AFB_1) on peanut surface was performed under UV irradiation at different UV irradiation intensities. With an initial quantity of 10 ng of AFB_1, it can be degraded thoroughly within 80 min under the intensity of 800 μw cm~(-2). The photodegradation pathway of AFB_1 on the peanut surface was proposed. Mutagenesis and cytotoxicity were assessed after exposure to different concentrations of AFB_1 and the mixtures of photodegradation products on the peanut surface. The results of the Ames and in vitro cytotoxicity assay, providing clues to the assessment of safety issues of UV method applied in AFB_1 decontamination, indicate that photodegradation products on the peanut surface has no toxicity, which can be explained by the differences in the chemical nature of the test compounds before and after UV irradiation.