Silica-modified magnetic nanoparticles functionalized with cetylpyridinium bromide for the preconcentration of metals after complexation with 8-hydroxyquinoline.

摘要: Abstract Magnetically driven separation technology has received considerable attention in recent decade for its great potential application. In this study, we investigate the application of silica-modified magnetite nanoparticles (NPs) coated with a cationic surfactant as adsorbent microextraction and determination trace amounts Cu(II), Ni(II), Co(II), Cd(II), Pb(II) Mn(II) from environmental water samples. The synthesized silica-coated NPs combination cetylpyridinium bromide have ability to adsolubilize metal ions after complexation 8-hydroxyquinoline. bearing target metals are easily separated aqueous solution by applying an external magnetic field complexed were desorbed using acidic methanol. analytes introduced into graphite furnace atomic absorption spectrometer. effect pH, complexing agent, amount bromide, time, desorption conditions, ionic strength on extraction efficiency investigated optimized. Under optimized detection limits 4.7, 9.1, 9.5, 2.3, 7.4 15.3 ng L −1 , respectively relative standard deviations ( n  = 6) less than 3.6%. accuracy method was evaluated recovery measurements spiked samples good recoveries (93–113%) low RSDs achieved.