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

A new chelating resin was synthesized by functionalization of a polymer support, Amberlite XAD-4 with salicylic acid through an azo linkage (N=N). The products were characterized by scanning electron microscopy,elemental analysis, Fourier transform infrared spectroscopy.The optimum conditions for the extraction of Pb(II), Cu(II), Ni(II), Co(II) and Zn(II) in aqueous samples were studied by batch. The determination of the metal ions was carried out by flame atomic absorption spectrometry. Their sorption equilibrium was reached within 30 min. The preconcentraion factor was 100 for a 500ml sample volume. The sorbed metal ions were eluted by 0.5M HNO3(5ml) within 10min with the desorption recovery of 90%. The new method gave a good accuracy in batch system with the recovery of 93% for the extraction of all metal ions and R. S. D. Less than 1.36% ( n=5).