Abstract We previously described a novel roller conveyer plasma device, which generates gas plasma via atmospheric pressure dielectric barrier discharge, to disinfect vegetables in situ during the sorting process. Here, we tested this system to verify whether or not such treatment was also effective in pesticide reduction. Competitive enzyme-linked immunosorbent assay showed the pesticide malathion, present at levels typically observed on treated crops, was efficiently degraded to less than one tenth of the original level within 1 min. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) and gas chromatography-mass spectrometry (GC-MS) confirmed the decrease in the level of pesticide cocktail PL-14-2 and FA-2, including organophosphorus pesticides and other classes of pesticides, after plasma treatment. A cholinesterase inhibitory activity assay was used as an index to measure the activity of PL-14-2 and FA-2, which showed that the gas plasma treatment reduced the biological activity of the pesticides. In addition to its proven biocidal effects, our findings demonstrate the potential of this non-thermal plasma system as a food safety control measure ensuring reduction of pesticide residues in foodstuffs.

中文翻译：

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使用非热气体等离子体减少农药的滚筒输送机系统 - 一种潜在的食品安全控制措施？

摘要 我们之前描述了一种新型辊道等离子设备，它通过大气压介质阻挡放电产生气体等离子体，在分拣过程中对蔬菜进行原位消毒。在这里，我们测试了这个系统，以验证这种处理是否也能有效减少农药。竞争性酶联免疫吸附试验表明，在经过处理的作物上通常以观察到的水平存在的杀虫剂马拉硫磷在 1 分钟内被有效降解到不到原始水平的十分之一。液相色谱-串联质谱 (LC-MS/MS) 和气相色谱-质谱 (GC-MS) 证实农药混合物 PL-14-2 和 FA-2 的水平下降，包括有机磷农药和其他类别的农药等离子处理后的杀虫剂。以胆碱酯酶抑制活性试验为指标测定PL-14-2和FA-2的活性，表明气体等离子体处理降低了农药的生物活性。除了已证实的杀菌效果外，我们的研究结果还证明了这种非热等离子体系统作为食品安全控制措施的潜力，可确保减少食品中的农药残留。