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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500 mL的环境水样中定量萃取PAEs目标物,只需50 mg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—58 ng·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%.
Fe3O4 (Fe3O4 / C) nanoparticles coated with carbon materials were prepared by hydrothermal reaction and used as solid-phase extraction adsorbents to collect phthalate esters (PAEs) pollutants from environmental water samples. Large specific surface area of nanomaterials and strong adsorption capacity of carbon materials, the Fe3O4 / C adsorbent has a high extraction efficiency.A quantitative extraction of PAEs from 500 mL of environmental water samples requires only 50 mg of adsorbent. The adsorption of Fe3O4 / C on the surface can be quickly equilibrated and the analytes eluted with a small amount of acetonitrile.Under the optimized SPE conditions, the detection limits of several PAEs ranged from 17-58 ng · L -1 The recovery rate of spiked water samples was 94.6% -106.6%, and the relative standard deviation was 2% -8%.