Preconcentration of Copper Ion on Modified Magnetic Fe3o4@Sio2 Nanoparticles in Some Environmental Samples and Its Determination By Electrothermal Atomic Absorption Spectrometry

Magnetic silica nanoparticles modified by 3-[2-(2-aminoethylamino) ethylamino] propyl-trimethoxysilane (aaapts) and salicylaldehyde were prepared and used as a new adsorbent for extraction and preconentration of copper ion through magnetic solid-phase extraction (mspe) method. after adsorption, these ions were desorbed with nitric acid followed by the determination with electrothermal atomic absorption spectrometry. fourier transform infrared spectroscopy (ft-ir), field emission scanning electron microscopy (fe-sem), transmission electron microscopy (tem), x-ray diffraction (xrd) spectrometry and vibrating sample magnetometer (vsm) were used to characterize the adsorbent. the mspe conditions were optimized.