Solid Phase Extraction of trace Cu(II) Using N,N´-disalicylideneethylenediamine Modified Graphene to Determination by FAAS

A simple, reliable and rapid method for preconcentration and modification of Graphene with N,N disalicylideneethylenediamine in order to prepare an effective sorbent for the preconcentration and determination of copper. The sorption capacity of N,N -disalicylideneethylenediamine -modified Graphene was 50 mg.g -1 and the optimum pH for the quantitative recovery of copper was found as 5.3. The optimum flow rate, sorbent amount and sample volume were 1.0 mL.min -1 , 300 mg and 50 mL, respectively. 5 mL of 4 mol.L -1 HNO3 was the most suitable eluent. The recommended method is simple and reliable for the determination of copper without any notable matrix effect and successfully applied to environmental water samples. The limit of detection of the proposed method is 4.6ng per mL. The method was applied to the extraction and recovery of Cu(II) in different water samples. In this method is relative standard deviation (R.S.D.) of 0.7%.