LAUSR

In the present study mixed hemimicelles dispersive solid phase extraction using polyaniline functionalized silica coated magnetic (Fe 3 O 4 @SiO 2 @PANI) nanoparticles for the extraction of chlorophenols from aqueous samples was investigated. The silica coated magnetic nanoparticles (Fe 3 O 4 @SiO 2 ) were synthesized, and then functionalized with aniline via oxidative polymerization reaction on the surface of silica coated magnetic nanoparticles (Fe 3 O 4 @SiO 2 @PANI). The obtained nanoparticles were characterized with scanning electron microscopy (SEM), energy dispersive X-ray (EDX), Fourier transformed infrared spectrometry (FTIR) and N 2 adsorption/desorption methods. The synthesized Fe 3 O 4 @SiO 2 @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 (r 2 ) 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.