Development of a cloud point extraction and preconcentration method for copper , cobalt and nickel prior to flame atomic absorption spectrometric determination

In this work,5bromine 3amino pyridine was used as a proper complexing agent for the preconcentration by cloud point extraction followed by atomic absorption spectrometric to determine of Ni2+, Cu2+ and Co2+ ions in real samples5bromine 3amino pyridine and Triton X-114 were used as hydrophobic ligand and non-ionic surfactant respectively and the pH of 8 was chosen as optimum. Under the optimized experimental conditions, the selective preconcentration and determination of low concentration of Ni2+, Cu2+ and Co2+ ions as 1, 5 and 6 ng ml-1 can be made respectively. The proposed method was successfully applied to the preconcentration and low-level determination of the cited ions in different water, samples

کلیدواژه ها:

Ni2+ ، Cu2+ and Co2+ ions ، Cloud-point extraction 5bromine 3amino pyridine