In the present study mixed hemimicelles dispersive solid phase extraction using polyaniline functionalized silica coated magnetic (Fe₃O₄@SiO₂@PANI) nanoparticles for the extraction of chlorophenols from aqueous samples was investigated. The silica coated magnetic nanoparticles (Fe₃O₄@SiO₂) were synthesized, and then functionalized with aniline via oxidative polymerization reaction on the surface of silica coated magnetic nanoparticles (Fe₃O₄@SiO₂@PANI). The obtained nanoparticles were characterized with scanning electron microscopy (SEM), energy dispersive X-ray (EDX), Fourier transformed infrared spectrometry (FTIR) and N₂ adsorption/desorption methods. The synthesized Fe₃O₄@SiO₂@PANI nanoparticles were applied as adsorbents for the extraction of chlorophenols (2-chlorophenol, 4-chlrorphenol, 2,4-dichlorophenol, 2,4,6-trichlorophenol) and the factors affecting extraction efficiency were optimized. At optimum conditions, good linearity with correlation of determination (r²) values ranges from 0.9931 to 0.9998, limits of detection in the range of 0.32–0.6 µg L⁻¹ and recoveries of chlorophenols using the proposed method were obtained between 91.0 and 95.0%. The proposed method was applied successfully to the extraction of chlorophenols from different matrix of water samples.

中文翻译：

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使用聚苯胺包覆的磁性纳米粒子对水样品中的氯酚进行混合半胶束分散固相萃取

在本研究中，研究了使用聚苯胺官能化的二氧化硅包覆的磁性（Fe ₃ O ₄ @SiO ₂ @PANI）纳米颗粒从水性样品中提取氯酚的混合半胶束分散固相萃取。二氧化硅涂布的磁性纳米颗粒（铁₃ ö ₄ @SiO ₂分别经由包被的磁性纳米颗粒（铁二氧化硅的表面上的氧化聚合反应合成，然后官能化的苯胺）₃ ö ₄ @SiO ₂@PANI）。通过扫描电子显微镜（SEM），能量色散X射线（EDX），傅立叶变换红外光谱（FTIR）和N ₂吸附/解吸方法对所得纳米颗粒进行表征。合成的Fe ₃ O ₄ @SiO ₂ @PANI纳米颗粒作为吸附剂用于提取氯酚（2-氯酚，4-氯酚，2,4-二氯酚，2,4,6-三氯酚）及影响萃取效率的因素被优化。在最佳条件下，与测定值（r ²）相关的良好线性范围为0.9931至0.9998，检出限为0.32–0.6 µg L ^-1使用该方法得到的氯酚的回收率在91.0％至95.0％之间。该方法成功地用于从不同基质的水样中提取氯酚。