【作者】 杨静； 邹文生； 邹宽； 乔俊琴； 练鸿振；

【Author】 Jing Yang Wen-sheng Zou Kuan Zou Jun-qin Qiao Hong-zhen Lian State Key Laboratory of Analytical Chemistry for Life Science,School of Chemistry & Chemical Engineering and Center of Materials Analysis,Nanjing University,Nanjing 210093

【机构】 生命分析化学国家重点实验室,南京大学化学化工学院和现代分析中心；

【摘要】 <正>多环芳烃(PAHs)是煤、石油、木材、烟草、有机高分子化合物等有机物不完全燃烧时产生的挥发性碳氢化合物,具有致癌、致畸、致突变性的"三致"作用,被认为是环境中危害极大的一类有机污染物。由于环境样品基质复杂,对其中PAHs的分析需进行相应的前处理,常用的前处理方法使用溶剂量大,耗时长,成本更多还原

【Abstract】 The carbon coated γ-Fe2O3 nanoparticles(γ-Fe2O3 /C) were synthesized by hydrothermal reaction and applied as solid phase extraction(SPE) sorbents to extract trace polycyclic aromatic hydrocarbons(PAHs) from environmental water samples.The γ-Fe2O3 /C sorbents possess high adsorption capacity and extraction efficiency due to strong adsorption ability of carbon materials and large surface area of nanoparticles.Only 20 mg of sorbents are required to extract PAHs from 100 mL water samples.The recycling time and solution pH have no obvious effect on the recoveries of PAHs.The analytes can be readily eluted with acetonitrile.The accuracy of the method was evaluated by the recoveries of spiked samples.Good recoveries(79.5%-111.2%) are achieved with relative standard deviations from 0.3% to 8.4%.This new SPE method shows a promising prospect on the purification of environmental water samples.The possible mechanism of extraction of γ-Fe2O3 /C to PAHs was preliminarily investigated.更多还原