Copper concentration using micelle-mediated extraction in real samples

Abstract

A simple and sensitive method is described for the pre-concentration by cloud point extraction followed by atomic absorption spectrometric determination of copper ion in real samples. At a solution pH of 5.5, 5, 5-diphenylimidazolidine-2, 4-dione (phenytoin) (DFID) and TritonX-114 were used as hydrophobic ligand and non-ionic surfactant. The adopted concentrations for DFID, Triton X-114 and HNO₃, bath temperature, centrifuge rate and time were optimized. Detection limits (3SDb/m) of 1.7 ng mL^-1 along with enrichment factors of 35 for these ions were achieved. The proposed procedure was applied to the analysis of real samples.