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

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

doi:10.1007/BF02046621

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

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

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Abstract

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%.

Original language	English
Journal	Journal of Radioanalytical and Nuclear Chemistry
Volume	131
Issue number	1
Pages (from-to)	171-187
ISSN	0236-5731
DOIs	https://doi.org/10.1007/BF02046621
Publication status	Published - 1989

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@article{c49010877c6e486b9441784311a4c642,

title = "Determination of Technetium-99 in Environmental Samples by Solvent Extraction at Controlled Valence",

abstract = "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%. ",

author = "Q.J. Chen and A. Aarkrog and H. Dahlgaard and S.P. Nielsen and E. Holm and H. Dick and K. Mandrup",

year = "1989",

doi = "10.1007/BF02046621",

language = "English",

volume = "131",

pages = "171--187",

journal = "Journal of Radioanalytical and Nuclear Chemistry",

issn = "0236-5731",

publisher = "Akademiai Kiado Rt.",

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TY - JOUR

T1 - Determination of Technetium-99 in Environmental Samples by Solvent Extraction at Controlled Valence

AU - Chen, Q.J.

AU - Aarkrog, A.

AU - Dahlgaard, H.

AU - Nielsen, S.P.

AU - Holm, E.

AU - Dick, H.

AU - Mandrup, K.

PY - 1989

Y1 - 1989

N2 - 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%.

AB - 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%.

U2 - 10.1007/BF02046621

DO - 10.1007/BF02046621

M3 - Journal article

SN - 0236-5731

VL - 131

SP - 171

EP - 187

JO - Journal of Radioanalytical and Nuclear Chemistry

JF - Journal of Radioanalytical and Nuclear Chemistry

IS - 1

ER -

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

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