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Polymer based adsorbents and their modified forms by various ligands have been effectively used for separation, preconcentration, determination and removal of heavy metal ions from different matrices. This paper proposes a solid phase extraction method based on 5-amino-1,10-phenanthroline (5-Aphen) functionalized glycidyl methacrylate-methyl methacrylate-divinylbenzene (GMA-MMA-DVB) crosslinked-polymeric microspheres for the determination of Fe (II), Ni (II), Pb (II) and Zn (II) in herbal tea samples employing flame atomic absorption spectrometry (FAAS).

The prepared adsorbent was characterized by FT-IR spectroscopy and BET. Several experimental variables affecting the sensitivity and efficiency of SPE method for the metal ions studied were investigated in detail by FAAS.

The optimal values of the adsorbent amount, pH, eluent properties, and flow rates were …