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Application of Cloud Point Extraction for Copper, Nickel, Zinc and Iron Ions in Environmental Samples
Author(s) -
Ghaedi Mehrorang,
Niknam Khodabakhsh,
Niknam Ebrahim,
Soylak Mustafa
Publication year - 2009
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200900143
Subject(s) - chemistry , cloud point , zinc , nitric acid , extraction (chemistry) , copper , nickel , enrichment factor , detection limit , atomic absorption spectroscopy , ion , nuclear chemistry , inorganic chemistry , analytical chemistry (journal) , chromatography , physics , organic chemistry , quantum mechanics
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.