光谱学与光谱分析 |
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Sensitivity Enhancement in Uranium Determination by UV-Visible Spectroscopy Using Ion Imprinted Polymer |
Tulin BCM, Mehmet YAMAN |
Firat University, Sciences Faculty, Department of Chemistry, Elazig, Turkey |
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Abstract There is need to determination of uranium concentration at ppb level in environmental matrices. Due to low sensitivity of FAAS, UV-Visible Spectroscopy is generally used as measurement technique. In this study, ion-imprinted polymers (IIP) were prepared for uranyl ion (imprint ion) by formation of ternary (salicylaldoxime and 4-vinylpyridine) complex in 2-methoxy ethanol (porogen) following copolymerization with methacrylic acid (MAA) as a functional monomer and ethylene glycol dimethacrylate (EGDMA) as crosslinking monomer using 2,2-azobisisobutyronitrile as initiator. The synthesized polymers were characterized by FT-IR and TGA analysis. Arsenazo Ⅲ in 3 M HClO4 was used as complexing agent in the measurement step. The optimal pH for preconcentration was found to be between 3.5~6.5 values. The developed method was applied to uranium (Ⅵ) determination in natural water samples.
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Received: 2015-10-14
Accepted: 2016-02-02
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Corresponding Authors:
Tulin BCM
E-mail: myaman@firat.edu.tr; ijpacmy@gmail.com
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