Enrichment of Pb(II)with nano-Fe3O4-encapsulated-dioctylphthalate and linkedethylenediamine sorbents Prior to determination by FAAS

A novel, simple, sensitive and effective method has been developed for preconcentration ofPb(II)on nano-Fe3O4-DOP-ED solid-phase extraction adsorbent. In this paper, Dioctylphthalate (DOP) was used to encapsulate nano-Fe3O4 and produce a nano-Fe3O4-DOPsorbent based new sorbent was prepared. This was treated with ethylenediamine (ED) inanother solvent-free procedure for the formation of a novel nano-Fe3O4-DOP-ED.Flameatomic absorption spectrometer was utilized for determination of Pb(II).Elution parameterswere also determined as 4 mL min-1; 0.6 mol L-1 and 5.1 mL forflow rate, eluentconcentration and eluent volume, respectively.Limit of detection and limit of quantificationwere found to be 49.6 and 163.7 ng L-1, respectively. Validation of the developed methodwas performed using certified reference material (TMDA-53.3). The methodology wasapplied for determination of Pb(II) in natural water samples and satisfactory results wereobtained.