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Comparative study of pertechnetate reduction by thiourea using spectrophotometric, solvent extraction and ion-exchange methods

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Abstract

The results of a comparative study of pertechnetate reduction by thiourea in mineral acid (HCl, HNO3, HClO4, H2SO4) media using spectrophotometric, solvent extraction and ion-exchange chromatographic methods are presented. Changes of spectral characteristics of redox systems and distribution characteristics of reduced technetium (cationic) forms on extraction with bis(1,2-dicarbollide)cobaltic acid and on ion exchange on Dowex 50WX8 were established as a function of time and either aqueous or organic phase composition. Thiourea was tested as a reagent for reduction back-extraction of technetium from organic phases containing the amines Aliquat 336 and trilaurylmethylammonium as convenient extraction reagents for pertechnetate.

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Authors and Affiliations

  1. Department of Nuclear Chemistry, Faculty of Sciences, Comenius University, SK-842 15, Bratislava, (Slovakia)

    R. Kopunec & M. Blazsek

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  1. R. Kopunec
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  2. M. Blazsek
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Kopunec, R., Blazsek, M. Comparative study of pertechnetate reduction by thiourea using spectrophotometric, solvent extraction and ion-exchange methods. Journal of Radioanalytical and Nuclear Chemistry, Articles 183, 171–180 (1994). https://doi.org/10.1007/BF02043131

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  • DOI: https://doi.org/10.1007/BF02043131

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