Development of efficient method for preconcentration and determination of copper, nickel, zinc and iron ions in environmental samples by combination of cloud point extraction and flame atomic absorption spectrometry |
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Authors: | Mehrorang Ghaedi Ardeshir Shokrollahi Khodabakhsh Niknam Ebrahim Niknam Mustafa Soylak |
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Institution: | (1) Chemistry Department, Yasouj University, 75914-353 Yasouj, Iran;(2) Chemistry Department, Bushehr University, Bushehr, Iran;(3) Chemistry Department, University of Erciyes, 38039 Kayseri, Turkey |
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Abstract: | A cloud point extraction procedure for the preconcentration of copper, nickel, iron and zinc ions in various samples has been
described. Analyte ions in aqueous phase are complexed with 3-((indolin-3-yl)(phenyl)methyl)indoline (IYPMI) and following
centrifugation quantitatively extracted to the aqueous phase rich in Triton X-114. The surfactant-rich phase was dissolved
in 2.0 mol L−1 HNO3 in methanol prior to metal content determination by flame atomic absorption spectrometry (FAAS). The effects of some parameters
including, the concentrations of IYPMI, Triton X-114 and HNO3, bath temperature, centrifuge rate and time were investigated on the recoveries of analyte ions. At optimum conditions, the
detection limits of (3 SDb m−1) of 1.6, 2.8, 2.1 and 1.1 ng mL−1 for Cu2+, Fe3+, Ni2+ and Zn2+ along with preconcentration factors of 30 and enrichment factor of 48, 39, 34 and 52 for Cu2+, Ni2+, Fe3+ and Zn2+ respectively, were obtained. The proposed cloud point extraction has been successfully applied for the determination of metal
ions in real samples with complicated matrix such as biological, soil and blood samples with high efficiency.
![MediaObjects/11532_2008_102_Fig1_HTML.jpg](/content/u5h3831848r318w8/MediaObjects/11532_2008_102_Fig1_HTML.jpg) |
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Keywords: | 3-((indolin-3-yl)(phenyl)methyl)indoline (IYPMI) Cloud Point Extraction Triton X-114 Flame Atomic Absorption Spectrometry |
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