Preconcentration of trace amounts of uranium in water samples on octadecyl silica membrane disks modified by bis(2-ethylhexyl) hydrogen phosphate and its determination by alpha-spectrometry without electrodeposition |
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| Authors: | Y Yamini P Ashtari A R Khanchi M Ghannadi-Maragheh M Shamsipur |
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| Institution: | (1) Department of Chemistry, Tarbiat Modarres University, Tehran, Iran;(2) Jaber Ibn Hayan Research Laboratories, Atomic Energy Organization of Iran, Tehran, Iran;(3) Department of Chemistry, Razi University, Kermanshah, Iran |
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| Abstract: | A simple and reliable method for the selective extraction and determination of uranium in water using octadecyl-bonded silica
membrane disks modified with bis (2-ethylhexyl) hydrogen phosphate and alpha-spectrometry is described. Extraction efficiency
and influence of sample matrix, optimum amount of extractant, type and minimum amount of organic eluent and flow rates were
evaluated. The limit of detection of the proposed method is 40 ng per 1000 ml. The influence of potential interfering cations
in water samples on the recovery of U(VI) was investigated. The method was successfully applied to the extraction and determination
of uranium in natural water. |
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