Immobilization of the thenoyltrifluoroacetone on sodium dodecyl sulfate modified magnetite nanoparticles for magnetic solid phase extraction of Pb (II) from water samples

Abstract

Magnetite nanoparticles (Fe3O4 NPs) were synthesized by co-precipitating method under optimized condition. The Fe3O4 NPs coated with sodium dodecyl sulfate-thenoyltrifluoroacetone (Fe3O4 NPs-SDS-TTFA) were then exerted as the magnetic solid phase extraction (MSPE) adsorbent for the extraction process prior to introducing to a flame atomic adsorption spectrometry (FAAS). The synthesized Fe3O4 NPs-SDS-TTFA were applied for the extraction of Pb(II) ions from different water samples. The characterization studies of nanoparticles were performed via scanning electron microscopy-energy dispersive micro-analysis (SEM-EDAX), X-ray diffraction (XRD) and vibrating sample magnetometer (VSM) techniques. The substantial parameters affecting the extraction efficiency were surveyed and optimized. A dynamic linear range (DLR) of 10-400 μg L-1 was obtained and the limit of detection (LOD, n=7) and relative standard deviation (RSD%, n= 6, C=20 μg L-1) were found to be 2.3 μg L-1 and 1.9%, respectively. According to the results, the proposed method successfully applied for the extraction of Pb(II) ions from different environmental water samples and satisfactory results achieved.