Liu Xiaofei, Lu Xin, Huang Yong, Liu Chengwei, Zhao Shulin
College of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, China.
College of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, China.
Talanta. 2014 Feb;119:341-7. doi: 10.1016/j.talanta.2013.11.039. Epub 2013 Nov 20.
A novel nano-adsorbent, Fe3O4@ionic liquid@methyl orange nanoparticles (Fe3O4@IL@MO NPs), was prepared for magnetic solid-phase extraction (MSPE) of polycyclic aromatic hydrocarbons (PAHs) in environmental water samples. The Fe3O4@IL@MO NPs were synthesized by self-assembly of the ionic liquid 1-octadecyl-3-methylimidazolium bromide (C18mimBr) and methyl orange (MO) onto the surface of Fe3O4 silica magnetic nanoparticles, as confirmed by infrared spectroscopy, ultraviolet-visible spectroscopy and superconducting quantum interface device magnetometer. The extraction performance of Fe3O4@IL@MO NPs as a nano-adsorbent was evaluated by using five PAHs, fluorene (FLu), anthracene (AnT), pyrene (Pyr), benzo(a)anthracene (BaA) and benzo(a)pyrene (BaP) as model analytes. Under the optimum conditions, detection limits in the range of 0.1-2 ng/L were obtained by high performance liquid chromatography-fluorescence detection (HPLC-FLD). This method has been successfully applied for the determination of PAHs in environmental water samples by using the MSPE-HPLC-FLD. The recoveries for the five PAHs tested in spiked real water samples were in the range of 80.4-104.0% with relative standard deviations ranging from 2.3 to 4.9%.
制备了一种新型纳米吸附剂——四氧化三铁@离子液体@甲基橙纳米颗粒（Fe3O4@IL@MO NPs），用于环境水样中多环芳烃（PAHs）的磁性固相萃取（MSPE）。通过红外光谱、紫外可见光谱和超导量子干涉仪磁力计证实，离子液体1-十八烷基-3-甲基咪唑溴化物（C18mimBr）和甲基橙（MO）在四氧化三铁二氧化硅磁性纳米颗粒表面自组装合成了Fe3O4@IL@MO NPs。以芴（FLu）、蒽（AnT）、芘（Pyr）、苯并(a)蒽（BaA）和苯并(a)芘（BaP）这5种多环芳烃作为模型分析物，评估了Fe3O4@IL@MO NPs作为纳米吸附剂的萃取性能。在最佳条件下，采用高效液相色谱-荧光检测（HPLC-FLD）获得了0.1 - 2 ng/L的检测限。该方法已成功应用于通过磁性固相萃取-高效液相色谱-荧光检测法测定环境水样中的多环芳烃。加标实际水样中5种多环芳烃的回收率在80.4% - 104.0%之间，相对标准偏差在2.3% - 4.9%之间。
