Method for determination of Pu isotopes in soil and sediment samples by inductively coupled plasma mass spectrometry after simple chemical separation using TK200 resin

Rapid and Simultaneous Determination of 238Pu, 239Pu, 240Pu, and 241Pu in Samples with High-Level Uranium Using ICP-MS/MS and Extraction Chromatography

“…The achieved DF(U) using two sequential TK200 columns is 5 orders of magnitude better than that of UTEVA + DGA, 27 3 orders of magnitude better than that of TEVA + DGA, 20 and 2 orders of magnitude better than that of TEVA + UTEVA + DGA, 15 which is also 2 orders of magnitude better than the previously reported method using two sequential TK200 cartridges for Pu separation. 21 This discrepancy might arise because Pu was eluted with 8.5 M HCl in the reported method, in which the affinity of U is lower than at 0.1 M HCl. As shown in Table S2, the DF(U) obtained in this work is the highest among all reported values using extraction or ion-exchange chromatography.…”

“…A preliminary experiment showed that a high decontamination factor of 6.60 × 10 7 for uranium and a Pu recovery of 90% were achieved using a single 2 mL TK200 column, which is similar to the highest DF(U) value reported using multiple chromatographic columns. 21 A further improvement of uranium removal with a DF(U) of >2.12 × 10 9 was achieved by directly loading the eluate with Pu(III) to another TK200 column (2 mL), followed by rinsing/eluting with 0.1 mol/L NH 2 OH•HCl−0.1 mol/L HCl. This is based on the low affinity of Pu(III) on the TK200 resin and a still higher retention of U(VI), which could not be reduced by NH 2 OH•HCl.…”

Simultaneous Determination of Transuranium Radionuclides for Nuclear Forensics by Compact Accelerator Mass Spectrometry

“…The experimental results indicate that only 3% of uranium passed through the TK200 cartridge and was adsorbed on the UTEVA cartridge, indicating that almost all of the uranium could be retained on the TK200 resin. The high sorption capacity of uranium on the TK200 resin in HNO 3 medium makes it difficult to efficiently separate U from the Pu fraction in a single resin column. The overall results show that about 34% of uranium was observed in the eluate of Np and Pu.…”

Atomic spectrometry update – a review of advances in environmental analysis

“…Methods developed 121 for the simultaneous determination of 237 Np and Pu isotopes employed 242 Pu as a yield tracer for all the nuclides measured. A new type of extraction resin, TK200, was used 122 for the isolation of Pu isotopes. The Pu recovery was 81-91% and the LOD was 0.13-0.24 pg kg À1 for a 2 g soil or sediment sample.…”