【摘要】 以FeCl₃为铁源用溶剂热法合成了磁性Fe₃O₄纳米粒子,再以葡萄糖为碳源水热法制备了Fe₃O₄/C纳米复合粒子.通过透射电镜（TEM）、X-射线衍射（XRD）、红外光谱（FT-IR）和差热-热重（TG-DSC）等分析手段对材料进行了表征.将材料应用于水体中防治白蚁药物毒死蜱、溴氰菊酯、联苯菊酯的磁固相萃取考察了材料用量、pH、萃取时间、洗脱溶剂、重复性等条件对萃取效率的影响在优化的实验条件下将该方法应用于实际水样的测定,样品的平均加标回收率在82.9%¹06.2%,相对标准偏差为2.1%⁹.6%,说明该分析方法准确可靠,Fe₃O₄/C纳米复合粒子与高效液相色谱联用的方法可以测定水体中防治白蚁药物残留.更多还原

【Abstract】 Fe₃O₄ nanoparticles were prepared by solvothermal method with FeCl₃ as the iron resource.Carbon coated Fe₃O₄ nanocomposites（Fe₃O₄/C） were prepared by hydrothermal reaction with the glucose as the carbon resource.The nanoparticles were characterized by transmission electron microscopy（TEM）,X-ray diffraction spectra（XRD）,Fourier transforminfrared spectra（FT-IR）,and thermogravimetry mass-differential scanning calorimetry spectrometry（TG-DSC）.The nanomaterial was then applied in the magnetic solid-phase extraction of termiticides in water such as chlorpyrifos,deltamethrin and bifenthrin.Various MSPE parameters were optimized including amount of Fe₃O₄/C nanoparticles,pH of sample solution,adsorption time,elution solvent and reusability.Good recoveries（82.9% 106.2%） were achieved with the relative standard deviations range from 2.1%⁹.6% with the optimal conditions.It is confirmed that the analysis method is accurate and reliable.The combination of Fe₃O₄/C nanocomposites and the high performance liquid chromatography can be used in the determination of termiticides in water.更多还原