中文摘要：本研究基于固相提取法分析了有机氯和有机磷农药在水培蔬菜组织内的累积、保留和分布情况，追踪了这两种农药在新鲜水培菠菜叶片、茎杆、根部的吸收和消除情况。研究基于体外监测数据分别计算了根系富集系数、浓度分布系数和蒸腾流浓度系数。结果表明：根部有机氯的浓度远高于有机磷，而叶片和茎杆的沉积浓度接近。有机氯或有机磷的RCD值随着 LogK(ow)值的升高而升高，但倍硫磷的情况例外。TSCF值表明，有机氯和有机磷从根部向叶片和茎杆的迁移首先取决于水培液的化合物组成，同时也受到水培液的溶解性的影响。
外文摘要：An in vivo uptake and elimination tracing study based on solid phase microextraction (SPME) was conducted to investigate the accumulation, persistence and distribution of organochloride pesticides (OCPs) and organophosphorus pesticides (OPPs) in malabar spinach (Basella alba L.) plants. Uptake and elimination of the pesticides were traced in leaves, stems and roots of living malabar spinach plants. Root concentration factor (RCF), distribution concentration factor (DCF) and transpiration stream concentration factor (TSCF) were calculated based on the in vivo tracing data. The tracing data showed that the OCPs were much more accumulative and persistent than the OPPs in roots, while they were similarly accumulative and persistent in leaves and stems. RCF values of the OPPs or OCPs were likely to increase with the increase in LogK(ow) values except fenthion. Obtained DCF values indicated that OPPs and OCPs were more accumulative in the organs containing more lipids. TSCF values showed that the translocation of OPPs and OCPs from roots to foliage was firstly dependent on the hydrophobicity of the compounds, but also significantly affected by the water solubility. This is the first study of generating RCF, DCF and TSCF data in living plants by in vivo sampling method, which provides a foundation to promote the application of in vivo SPME and improve understanding of contaminant behaviors in living plants.
外文关键词：Different organs；In vivo tracing；Malabar spinach；Organochloride/organophosphorus pesticides；Solid-phase microextraction
作者：Junlang Qiua；Guosheng Chena；Jianqiao Xua等
作者单位：广州中山大学
期刊名称：JOURNAL OF HAZARDOUS MATERIALS
期刊影响因子：4.836
出版年份：2016
出版刊次：5
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