A new functionalized resin and its application in flame atomic absorption spectrophotometric determination of trace amounts of heavy metal ions after solid phase extraction in water samples

► Synthesis of a low cost, environmentally friendly solid phase resin: Amberlite XAD-4[salicyl aspartide]. ► Development of an extraction method for preconcentration of Pb(II), Cu(II), Ni(II0, Co(II), and Zn(II) in aqueous solution by this resin. ► High selectivity for cations by pH control. ► High sorption capacity with high preconcentration factor. ► Quantitative recovery of the resin.