On-line separation of Pu(III) and Am(III) using extraction and ion chromatography |
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| Authors: | J. Jernström J. Lehto M. Betti |
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| Affiliation: | 1.Radiation Research Department, Ris? National Laboratory,Technical University of Denmark,Roskilde,Denmark;2.Laboratory of Radiochemistry, Department of Chemistry,University of Helsinki,Helsinki,Finland;3.European Commission, Joint Research Centre,Institute for Transuranium Elements,Karlsruhe,Germany |
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| Abstract: | An on-line method developed for separating plutonium and americium was developed. The method is based on the use of HPLC pump with three analytical chromatographic columns. Plutonium is reduced throughout the procedure to trivalent oxidation state, and is recovered in the various separation steps together with americium. Light lanthanides and trivalent actinides are separated with TEVA resin in thiocyanate/formic acid media. Trivalent plutonium and americium are pre-concentrated in a TCC-II cation-exchange column, after which the separation is performed in CS5A ion chromatography column by using two different eluents. Pu(III) is eluted with a dipicolinic acid eluent, and Am(III) with oxalic acid eluent. Radiochemical and chemical purity of the eluted plutonium and americium fractions were ensured with alpha-spectrometry. |
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