Solid phase extraction of trace Cu(II)using Naphtol-2-(Pyridylazo-2)-1 (PAN) modified Single walled carbon nanotubes (SWCNTs) to Determination by FAAS

Abstract

A simple, reliable and rapid method for preconcentration and modified solid phase C 18 with Single-Walled Carbon Nanotubes with Naphtol-2-(Pyridylazo-2)-1 (PAN) in order to prepare an effective sorbent for the preconcentration and determination of copper. The sorption capacity of Naphtol-2-(Pyridylazo-2)-1 (PAN) -modified Single walled carbon nanotubes (SWCNTs) was 50 mg.g -1 and the optimum pH for the quantitative recovery of copper was found as 3.0. The optimum flow rate, sorbent amount and sample volume were1.0 mL.min -1 , 300 mg and 50 mL, respectively. 5 mL of 4 mol.L -1 HNO 3 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 results of this study show that little amount of Cu 2+ ion with the aid of minimum chemical substacnces, in a relatively short amount of time, and with high percentage of recovery, can be isolated and identified. In this method, the detection limits equal to 0.1µg.mL -1 , were achieved with the experiment's relative standard deviation of (n=10) equal to 1.25% factor prior to condensation equating to 125 and the column capacity of 205 µg for each adsorbent.The accuracy of the proposed method was compared with other standard methods, it became clear superiority. Similar experiments on natural samples under optimal conditions have proven the efficiency of this method at an industrial scale.