Application of Cloud Point Extraction for Copper, Nickel, Zinc and Iron Ions in Environmental Samples

ghaedi M., Niknam K., Niknam E., SOYLAK M.

JOURNAL OF THE CHINESE CHEMICAL SOCIETY, cilt.56, ss.981-986, 2009 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 56 Konu: 5
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1002/jccs.200900143
  • Sayfa Sayıları: ss.981-986


A cloud point extraction procedure was presented for the preconcentration of copper, nickel, zinc and iron ions in various samples. After complexation by 2-(6-(1H-benzo[d]imidazol-2-yl)pyridin-2-yl)-1H-benzo[d]Imidazole (BIYPYBI), analyte ions are quantitatively extracted in Triton X-114 following centrifugation. 1.0 mol L(-1) HNO(3) nitric acid in methanol was added to the surfactant-rich phase prior to its analysis by flame atomic absorption spectrometry (FAAS). The adopted concentrations for BIYPYBI, Triton X-114 and HNO(3) and bath temperature, centrifuge rate and time were optimized. Detection limits for Cu(2+), Fe(3+), Zn(2+) and Ni(2+) ions was 1.4, 2.2, 1.0 and 1.9 ng mL(-1), respectively. The preconcentration factors for all ions was 30, while the enrichment factor of Cu(2+), Fe(3+), Zn(2+) and Ni(2+) ions was 35, 25, 39 and 30, respectively. The proposed procedure was applied to the analysis of real samples.