中文摘要：

利用水热反应制备碳材料包覆的Fe3O4（Fe3O4／C）纳米颗粒，并将这种材料用作固相萃取吸附剂，从环境水样中富集酞酸酯类（PAEs）污染物．由于纳米材料大的比表面积和碳材料强的吸附能力，Fe3O4／C吸附剂拥有较高的萃取效率．从500mL的环境水样中定量萃取PAEs目标物，只需50mg的吸附剂．PAEs在Fe3O4／C表面的吸附可快速达到平衡，并且用少量的乙腈就能将分析物洗脱下来．在优化的固相萃取条件下，几种PAEs的检出限在17—58ng·L^-1之间．通过水样的加标回收率来评价该方法，其加标回收率在94．6％-106．6％之间．相对标准偏差为2％-8％．

英文摘要：

Carbon coated Fe3O4 nanoparticles （Fe3 O4/C ） were synthesized by a simple hydrothermal reaction and applied as solid-phase extraction （SPE） sorbents to extract trace phthalate esters （PAEs） from environmental water samples. The Fe3 O4/C sorbents possess high extraction efficiency due to strong adsorption ability of carbon materials and large specific surface area of the nanoparticles. Only 50 mg of sorbents were needed to extract PAEs from 500 mL water samples. The adsorption reached equilibrium rapidly and the analytes were eluted with acetonitrile readily. Salinity and solution pH had no obvious effect on the recovey of PAHs, which avoids fussy adjustment to water sample before extraction. Under optimized conditions, the detection limit of PAEs was in the range of 17--58 ng. L-1. The accuracy of the method was evaluated by the recoveries of spiked samples. Good recoveries （94.6%--106.6%） with low relative standard deviations from 2% to 8% were achieved. This new SPE method provides several advantages, such as high extraction efficiency, high breakthrough volume, convenient extraction procedure, and short analysis time.