Application of Cloud Point Extraction for Copper,Nickel, Zinc and Iron Ions in Environmental Samples |
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Authors: | Mehrorang Ghaedi Khodabakhsh Niknam Ebrahim Niknam Mustafa Soylak |
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Affiliation: | 1. Chemistry Department, Yasouj University, Yasouj 75914‐353, Iran;2. Chemistry Department, Persian Gulf University, Bushehr, Iran;3. Chemistry Department, University of Erciyes, 38039 Kayseri, Turkey |
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Abstract: | 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 HNO3 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 HNO3 and bath temperature, centrifuge rate and time were optimized. Detection limits for Cu2+, Fe3+, Zn2+ and Ni2+ 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 Cu2+, Fe3+, Zn2+ and Ni2+ ions was 35, 25, 39 and 30, respectively. The proposed procedure was applied to the analysis of real samples. |
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Keywords: | 2‐(6‐(1H‐benzo[d]imidazol‐2‐yl)pyridin‐2‐yl)‐1H‐benzo[d]Imidazole Cloud point extraction Triton X‐114 Flame atomic absorption spectrometry |
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