Abstract

Determination of copper and nickel in real samples by rubeanic acid in micelle-mediated

Author(s): F.Ahmadi, M.Mohaghegheyan, A.Khanmohammadi, Z.Ghezelbash

Cloud point extraction (CPE) has been used for the simultaneous preconcentration of copper and nickel after the formation of a complex dithioxamide (rubeanic acid) (DTO), and later analysis by flame atomic absorption spectrometry (FAAS) using (Triton X-114) as surfactant. The parameters affecting the separation phase and detection process were optimized. Under the optimum experimental conditions (i.e. pH = 6.0, 0.09mMDTO, TritonX-114 = 0.07%(w/v)), calibration graphswere linear in the range of 20-650 and 15-850 ngml-1with detection limits of 0.9 and 1.5 ng ml-1 for Cu and Ni, respectively. The method was applied to the determination of Cu and Ni in natural and waste water samples with satisfactory results.