Gamma irradiation (60 Co) in postharvest of common beans (Phaseolus vulgaris L.), has already proven beneficial, regarding the prolongation of shelf life and physical, chemical, and organoleptic aspects of grains. However, few prior studies have investigated the effect of gamma irradiation on the dissipation of pesticides in foods, especially insecticides in beans. This study aimed to evaluate the waste dissipation of two insecticides, imidacloprid and thiamethoxam, used in the cultivation of common bean, a variety of Carioca, using gamma irradiation. Ground bean samples were spiked each insecticide in the laboratory at 3, 4, and 5 mg/kg, and were then irradiated at 0, 1, and 2 kGy per irradiator with a 60 Co source. Liquid chromatography-tandem mass spectrometry was used to quantify the insecticides. The irradiation promoted dissipation of thiamethoxam at 1 and 2 kGy doses, with the highest dissipation verified at 2 kGy. In general, at this higher dose of irradiation the reduction dissipation of thiamethoxam was 66% of the mean value found in the treatment without irradiation and ∼44% relative to the 1 kGy dose. Conversely, imidacloprid showed no effect of irradiation on waste dissipation, except in the treatment of 5 mg/kg at 2 kGy dose. From the results, it was concluded that the gamma irradiation might have applicability in dissipating thiamethoxam in real bean samples. PRACTICAL APPLICATION Pesticide residues remaining from bean cultivation, sensitive to optimal doses of gamma irradiation, can be transformed into other less harmful or nonharmful substances, increasing the quality of the beans before the food arrives at the consumer's table. Irradiation of the grains after harvest also eliminates the need for application of other pesticides to preserve the grains during storage, as the technique is capable of eradicating deteriorating agents, such as microorganisms and insects.

中文翻译：

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普通豆采后吡虫啉和噻虫嗪残留物中伽马辐照的耗散潜力

在普通豆类 (Phaseolus vulgaris L.) 的收获后，伽马辐照 (60 Co) 已被证明对延长谷物的保质期和物理、化学和感官方面是有益的。然而，很少有先前的研究调查了伽马辐射对食品中杀虫剂消散的影响，尤其是豆类中的杀虫剂。本研究旨在评估两种杀虫剂吡虫啉和噻虫嗪的废物消散，这些杀虫剂用于使用伽马射线辐照种植普通豆类、各种 Carioca。磨碎的豆类样品在实验室中以 3、4 和 5 mg/kg 的浓度添加每种杀虫剂，然后用 60 Co 源以每个辐照器 0、1 和 2 kGy 辐照。液相色谱-串联质谱法用于量化杀虫剂。辐照促进噻虫嗪在 1 和 2 kGy 剂量下的消散，最高消散在 2 kGy 时得到证实。一般来说，在这种较高剂量的照射下，噻虫嗪的耗散减少是未照射治疗中发现的平均值的 66%，相对于 1 kGy 剂量约为 44%。相反，吡虫啉显示辐射对废物消散没有影响，除了在 2 kGy 剂量下以 5 mg/kg 处理。结果表明，伽马辐照可能适用于消散真豆样品中的噻虫嗪。实际应用 豆类种植中残留的农药残留，对最佳剂量的 γ 辐射敏感，可以转化为其他危害较小或无害的物质，从​​而在食品到达消费者手中之前提高豆类的质量。稳定的。收获后对谷物进行辐照还消除了在储存期间使用其他杀虫剂来保存谷物的需要，因为该技术能够根除微生物和昆虫等变质剂。