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Dithiocarbamate extraction of trace amounts of selenium from biological samples for neutron activation analysis

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Abstract

A three-step method has been developed for extracting trace amounts of selenium from biological samples for neutron activation analysis /NAA/. After acid digestion, the sample is first extracted with lead diethyldithiocarbamate at pH 4 to remove a number of interfering elements. Next, selenium is extracted with sodium diethyldithiocarbamate into chloroform at pH 1.5. Finally, selenium is back-extracted with concentrated nitric acid for NAA. Analysis of selenium extracted from four standard reference materials resulted in excellent agreement with the certified values of selenium concentration. A detection limit of 0.05 μg has been achieved.

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Authors and Affiliations

  1. Department of Chemistry and Physics, University of Idaho, ID 83843, Moscow, USA

    N. M. Hani, C. M. Wai & H. Willmes

Authors
  1. N. M. Hani
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  2. C. M. Wai
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  3. H. Willmes
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Hani, N.M., Wai, C.M. & Willmes, H. Dithiocarbamate extraction of trace amounts of selenium from biological samples for neutron activation analysis. Journal of Radioanalytical and Nuclear Chemistry Letters 104, 19–28 (1986). https://doi.org/10.1007/BF02165417

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  • DOI: https://doi.org/10.1007/BF02165417

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