The effects of non-thermal plasma (NTP) on elimination of pesticide residues and on quality changes of mango (cv. Nam Dok Mai) were investigated. Varied flow rate of Ar gas (2, 5 and 8 L/min) and time dependent degradations of chlorpyrifos and cypermethrin as a result of NTP treatments using a gliding arc (GA) discharge for 5 or 10 min were studied. Results showed that the NTP treatment for 5 min at 5 L/min Ar flow rate successfully decreased the concentrations of chorpyrifos by 74.0% and cypermetrin by 62.9%. There were significant (p ≤ 0.05) decreases in titratable acidity and total phenolic content and increases in carotenoid content for the treated mangoes. However, total soluble solid, color and texture parameters were not significantly different (p > 0.05). The emission signal of hydroxyl (OH) radicals at 309 nm was also obtained to monitor that the system was working properly.

Industrial relevance

This study demonstrates the potential application of non-thermal plasma (NTP) as a way to eliminate pesticide residues and on quality changes in mango. A varied flow rate of Ar gas and time dependent degradation of chlorpyrifos and cypermethrin were studied for NTP treatments produced using a gliding arc (GA) discharge. Our results have proved that the GA discharge NTP has the potential to be an effective method to ensure chemical safety not only for mangoes, but also for other types of postharvest produce. This system can be adapted for the industrial up-scale.

中文翻译：

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非热等离子体消除芒果中的农药残留

研究了非热等离子体（NTP）对消除农药残留和芒果（cv。Nam Dok Mai）品质变化的影响。研究了使用滑弧放电（GA）放电5或10分钟进行NTP处理后，氩气的各种流速（2、5和8 L / min）以及毒死rif和氯氰菊酯的时间依赖性降解。结果表明，以5 L / min Ar流速进行NTP处理5 min可以成功地使毒死concentrations的浓度降低74.0％，使cypermetrin的浓度降低62.9％。处理过的芒果的可滴定酸度和总酚含量显着降低（p≤0.05），而类胡萝卜素含量则显着增加。但是，总可溶性固形物，颜色和质地参数没有显着差异（p> 0.05）。羟基（OH还获得了309 nm的自由基以监测系统是否正常工作。

行业相关性

这项研究证明了非热等离子体（NTP）作为消除农药残留和芒果质量变化的一种潜在方法。对于使用滑弧（GA）放电生产的NTP，研究了变化的氩气流速以及毒死os和氯氰菊酯的时间依赖性降解。我们的结果证明，GA排放NTP有可能成为一种有效的方法，不仅可以确保芒果和其他类型的收获后农产品的化学安全性。该系统可适用于工业规模。