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Journal article

Determination of Technetium-99 in Environmental Samples by Solvent Extraction at Controlled Valence

By Chen, Q.J.1; Aarkrog, A.1; Dahlgaard, H.1; Nielsen, S.P.1; Holm, E.; Dick, H.; Mandrup, K.

From

Risø National Laboratory for Sustainable Energy, Technical University of Denmark1

Distribution coefficients of technetium and ruthenium are determined under different conditions with CCl4, cyclohexanone, and 5% tri-isooctylamine (TIOA)/xylene. A method for analyzing 99Tc in environmental samples has been developed by solvent extraction in which the valences of technetium and ruthenium are controlled with H2O2 and NaClO.

Technetium and ruthenium which are oxidized to TcO4- and RuO4- by NaClO are separated by extraction with CCl4 at pH 4. The RuO4- is reduced to low valence and technetium is kept in the TcO4- state with H2O2. Technetium, ruthenium, and other nuclides are subsequently separated by solvent extraction with cyclohexanone and 5% TIOA/xylene.

The decontamination of the procedure is 1.35 .cntdot. 105 for 103Ru and 1.66 .cntdot. 105 for 110mAg. The chemical yield of technetium-99 is 55%.

Language: English
Publisher: Kluwer Academic Publishers
Year: 1989
Pages: 171-187
Journal subtitle: An International Journal Dealing With All Aspects and Applications of Nuclear Chemistry
ISSN: 15882780 and 02365731
Types: Journal article
DOI: 10.1007/BF02046621
ORCIDs: Nielsen, S.P.
Keywords

Chemistry Diagnostic Radiology Inorganic Chemistry Nuclear Chemistry Nuclear Physics, Heavy Ions, Hadrons Physical Chemistry

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