Preparation of carbon coated Fe3O4 nanoparticles and their application for solid-phase extraction of polycyclic aromatic hydrocarbons from environmental water samples
Preparation of carbon coated Fe3O4 nanoparticles and their application for solid-phase extraction of polycyclic aromatic hydrocarbons from environmental water samples
复制标题
碳包覆Fe3O4纳米粒子的制备及其在环境水样中固相萃取多环芳烃中的应用
DOI：
10.1016/j.chroma.2010.05.035
复制
发表时间：
2010-07-16
影响因子：
4.1
通讯作者：
Shi, Yali
中科院分区：
文献类型：
--
作者：
Zhang, Shengxiao;Niu, Hongyun;Shi, Yali
采用水热法制备了碳包覆Fe 3 O 4纳米粒子（Fe 3 O 4/C），并将其作为固相萃取（SPE）吸附剂用于环境水样中痕量多环芳烃（PAHs）的萃取。由于炭材料的吸附能力强，纳米颗粒的比表面积大，Fe 3 O 4/C吸附剂具有较高的吸附容量和萃取效率，从1000 mL水样中萃取多环芳烃仅需50 mg吸附剂。吸附迅速达到平衡，分析物很容易用乙腈洗脱。盐度和溶液pH值对多环芳烃的回收率没有明显影响，避免了萃取前对水样的繁琐调整。在优化条件下，多环芳烃的检出限在0.2-0.6 ng L-1的范围内。通过加标样品的回收率评价方法的准确度。回收率为76-110%，相对标准偏差为0.8%-9.7%。这种新的固相萃取方法具有萃取效率高、穿透体积大、萃取操作简便、分析时间短等优点。据我们所知，这是第一次将Fe 3 O 4/C纳米粒子用于环境水样的预处理。(C)2010 Elsevier B. V.保留所有权利。
The carbon coated Fe3O4 nanoparticles(Fe3O4/C) were synthesized by a simple hydrothermal reaction and applied as solid-phase extraction (SPE) sorbents to extract trace polycyclic aromatic hydrocarbons (PAHs) from environmental water samples. The Fe3O4/C sorbents possess high adsorption capacity and extraction efficiency due to strong adsorption ability of carbon materials and large surface area of nanoparticles, and only 50 mg of sorbents are required to extract PAHs from 1000 mL water samples. The adsorption attains equilibrium rapidly and analytes are eluted with acetonitrile readily. Salinity and solution pH have no obvious effect on the recoveries of PAHs, which avoids fussy adjustment to water sample before extraction. Under optimized conditions, the detection limits of PAHs are in the range of 0.2-0.6 ng L-1. The accuracy of the method was evaluated by the recoveries of spiked samples. Good recoveries (76-110%) with low relative standard deviations from 0.8% to 9.7% are achieved. This new SPE method provides several advantages, such as high extraction efficiency, high breakthrough volumes, convenient extraction procedure, and short analysis times. To our knowledge, this is the first time that Fe3O4/C nanoparticles are used for the pretreatment of environmental water samples. (C) 2010 Elsevier B.V. All rights reserved.