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首页> 外文期刊>Quality Assurance and Safety of Crops & Foods >The effects of heat treatment on the degradation of the organophosphate pesticide chlorpyrifos-ethyl in tomato homogenate
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The effects of heat treatment on the degradation of the organophosphate pesticide chlorpyrifos-ethyl in tomato homogenate

机译：热处理对降解的影响有机磷农药的chlorpyrifos-ethyl茄匀浆

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摘要

Tomato is often thermally processed. Chlorpyrifos-ethyl, a broad-spectrum organophosphate pesticide, is widely used on the tomato plants. Therefore, understanding of the fate of the residues during the tomato thermal processing is important for the calculation of dietary exposure. The effects of thermal processing on the reduction of the chlorpyrifos-ethyl residues in tomato homogenates were investigated. Tomato homogenates spiked with chlorpyrifos-ethyl were subjected to thermal processing at the commonly used temperature values (60-90 degrees C) at various time intervals (10-60 min) in the production of tomato products. A QuEChERS technique for sample preparation and a gas chromatograph-electron capture detector for analysing chlorpyrifos-ethyl residues in tomato homogenate were used. The results were further confirmed by using a gas chromatography-mass spectrometry system. Reduction rate of the chlorpyrifos-ethyl residues was as high as 55.8% at 90 degrees C for 60 min. Degradation rates could be considered as first order kinetics model. Apparent activation energies (Ea), temperature coefficients (Q(10)), half time (DT50) and time to reduce to 90% of the initial value (DT90) of chlorpyrifos-ethyl were calculated as kinetic parameters. The results of this study could shed light on the fate of chlorpyrifos-ethyl residues during tomato processing and may also prove invaluable in estimating potential risk from dietary exposure.
机译：番茄通常是热处理。Chlorpyrifos-ethyl、广谱有机磷农药,广泛应用番茄植物。在番茄热残留的命运处理的计算是很重要的膳食暴露。处理的减少chlorpyrifos-ethyl残留在番茄匀浆被调查。chlorpyrifos-ethyl受到热处理在常用的温度值(60 - 90摄氏度)在不同的时间间隔(60分钟)生产的番茄产品。准备和气体chromatograph-electron捕获分析chlorpyrifos-ethyl探测器茄匀浆残留。结果进一步证实了通过使用天然气相色谱-光谱法系统。chlorpyrifos-ethyl残留的还原速度高达55.8%的90摄氏度60分钟。降解率可以被认为是第一个以动力学模型。能量(Ea)、温度系数(Q (10)),一半时间(DT50)和时间减少的90%初始值(DT90) chlorpyrifos-ethyl计算动力学参数。本研究可能的命运chlorpyrifos-ethyl残留在番茄处理,也可能是无价的从膳食暴露评估潜在风险。

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