中文摘要：研究利用固相微萃取技术、气相色谱质谱技术监测了甘蓝和芦荟中有机磷农药的吸收与消除情况，并应用液相色谱串联质谱分析了芦荟中倍硫磷的代谢情况。结果表明，有机磷降解速度快，对植物生长更安全；植物体内倍硫磷亚砜的峰值浓度已超过最大残留限值，且高于倍硫磷的浓度，表明倍硫磷代谢过程中存在潜在的残留风险。该研究重点讨论了体外固相微萃取技术在不同植物活体内农药残留监测的应用情况；该方法非常简便，且能为分析不同农药残留风险提供更多数据，这对农产品质量安全管理至关重要。
外文摘要：In vivo solid-phase microextraction (SPME) sampling method coupled with gas chromatography-mass spectrometry (GC-MS) analysis was employed to trace the uptake and elimination of organophosphorus pesticides (OPPs) in two kinds of edible plants, cabbage (Brassica parachinensis) and aloe (Barbadensis). The metabolism of fenthion in aloe was also investigated by the liquid chromatography tandem mass spectrometry analysis (LC-MS/MS) to understand the fate of OPPs in living plants better. Transpiration stream concentration factor (TSCF) and depuration rate constants of the OPPs in living plants were obtained therein. The health risk of the OPPs treated aloe was estimated by the maximum residue limit (MRL) approach, and it revealed that the OPPs were rather safe for their fast degradable property. However, peak concentration of fenthion-sulfoxide was found to exceed the MRL and was higher than that of the parent fenthion, which indicated the potential risk of pesticide metabolites. This study highlighted the application of in vivo SPME for contaminant tracing in different living edible plants. The in vivo tracing method is very convenient and can provide more data to evaluate the risk of different pesticides, which are very important for the safety of agriculture production.
外文关键词：In vivo tracing；Solid-phase microextraction；Organophosphorus pesticides；Uptake and elimination；Metabolism；Risk assessment
作者：Qiu, Junlang；Chen, Guosheng；Zhou, Hong等
作者单位：中山大学
期刊名称：Sci Total Environ.
期刊影响因子：3.976
出版年份：2015
出版刊次：11
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