Abstract Ultraviolet irradiation (UV) has been used as a non-thermal processing method for food disinfection. In disinfecting solid foods such as peanuts, UV irradiation could be shaded or attenuated with increased distance, resulting in non-uniform dosage distribution. An affordable, rapid, and feasible method for measuring and improving irradiance distribution, however, is unavailable for detoxifying peanuts. In this study, a method was developed for rapidly quantifying UV dosage distribution on peanuts in a UV disinfection process. The darkening of the UV indicator, AgCl, was linearly proportional to the UV dosage from 0 to 120 mJ/cm2 delivered on peanuts. The uniformity of UV dosage distribution was described by measuring the color change of UV indicator at four points on two orthogonal axes of each peanut kernel. The UV indicator coated peanuts were then rotated in a customized cylindrical chamber at different speeds. A rotation speed with more uniform UV dosage distribution was determined and applied to an aflatoxin detoxification process. The results demonstrate that the UV uniformity was significantly improved when peanuts were rotated at 11 rpm in the cylindrical chamber. Furthermore, after irradiating with 2.3 mW/cm2 UV-C for 2 h, the aflatoxin B1 degradation rate increased from 60.8 ± 15.3 pmol g−1h−1 to 75.0 ± 10.9 pmol g−1h−1 in the peanuts rotated at 11 rpm, compared to those that were not rotated.

中文翻译：

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轮作花生对紫外C光解毒黄曲霉毒素的影响及AgCl基剂量计对辐照均匀度的评价

摘要 紫外线照射 (UV) 已被用作食品消毒的非热加工方法。在对花生等固体食物进行消毒时，紫外线照射会随着距离的增加而被遮蔽或减弱，从而导致剂量分布不均匀。然而，没有一种经济实惠、快速且可行的方法来测量和改善辐照度分布，无法用于花生解毒。在这项研究中，开发了一种方法来快速量化紫外线消毒过程中花生的紫外线剂量分布。紫外线指示剂 AgCl 的变暗与施加在花生上的 0 至 120 mJ/cm2 的紫外线剂量成线性比例。通过测量每个花生仁两个正交轴上四个点紫外线指示剂的颜色变化来描述紫外线剂量分布的均匀性。然后将涂有紫外线指示剂的花生在定制的圆柱形室中以不同的速度旋转。确定了具有更均匀紫外线剂量分布的旋转速度并将其应用于黄曲霉毒素解毒过程。结果表明，当花生在圆柱形腔室中以 11 rpm 的速度旋转时，紫外线均匀性显着提高。此外，在用 2.3 mW/cm2 UV-C 照射 2 h 后，在以 11 rpm 旋转的花生中，黄曲霉毒素 B1 的降解率从 60.8 ± 15.3 pmol g−1h−1 增加到 75.0 ± 10.9 pmol g−1h−1，与那些没有轮换的相比。结果表明，当花生在圆柱形腔室中以 11 rpm 的速度旋转时，紫外线均匀性显着提高。此外，在用 2.3 mW/cm2 UV-C 照射 2 h 后，在以 11 rpm 旋转的花生中，黄曲霉毒素 B1 的降解率从 60.8 ± 15.3 pmol g−1h−1 增加到 75.0 ± 10.9 pmol g−1h−1，与那些没有轮换的相比。结果表明，当花生在圆柱形腔室中以 11 rpm 的速度旋转时，紫外线均匀性显着提高。此外，在用 2.3 mW/cm2 UV-C 照射 2 h 后，在以 11 rpm 旋转的花生中，黄曲霉毒素 B1 的降解率从 60.8 ± 15.3 pmol g−1h−1 增加到 75.0 ± 10.9 pmol g−1h−1，与那些没有轮换的相比。