A separation procedure for the analysis of90Sr,154Eu, and the actinides237Np,239Pu,241Am and244Cm

Abstract

A procedure for the analysis of 9~ 154Eu, 237Np, 239pu, 24tAm and 242-244Cm was developed. Separation was done with the separating agent, di-2(ethyl hexyl)-phosphoric acid (HDEHP), and results in fractions containing the different elements to be analysed. 9~ analysis was done by analysing its daughter nuclide 90y, detected through the Cherenkov radiation emitted by this high energy ~--emitter. 154Eu was detected using 7-spectrometry with a lower Compton background as a result of the removal of other fission products. 241Am could also be detected with T-spectrometry or together with 242-244Cm with o~-spectrometry. The long-lived radionuclides 237Np and 239pu were detected using inductively coupled plasma mass spectrometry (ICP-MS).

Rapid determination of plutonium in urine using flow injection on-line preconcentration and inductively coupled plasma mass spectrometry

“…Different approaches have been used to overcome these problems. For the preconcentration and separation of Pu from sample matrices, different chromatographic approaches, such as the Emporet anion exchange-SR resin disk, 10 a combination of Dowex 1X8 and TEVA resins, 11 tri-n-octylamine extraction chromatography, 12 HDEHP in solvent extraction, 13 high-capacity cation-exchange (CS10 column) with silver oxide as an oxidizing agent and 40 mM 2,3-diaminopropionic acid monohydronitrate in 0.6 M HNO 3 as eluent in isocratic mode, 14 have been successfully applied. In addition, ion chromatography has been used to separate Pu from U to avoid uranium hydride interferences.…”

“…In addition, ion chromatography has been used to separate Pu from U to avoid uranium hydride interferences. 13,14 Desolvating nebulizers have been used to significantly reduce water loading to the plasma during sample introduction, and consequently to reduce the formation of UH 1 and UH 2 1 species. 10,11,13 However, most of these methods involve multiple stages of preconcentration and separation, resulting in tedious and time-consuming procedures.…”

“…13,14 Desolvating nebulizers have been used to significantly reduce water loading to the plasma during sample introduction, and consequently to reduce the formation of UH 1 and UH 2 1 species. 10,11,13 However, most of these methods involve multiple stages of preconcentration and separation, resulting in tedious and time-consuming procedures. Recently, a rapid and sensitive technique for the determination of 239 Pu in urine was developed; 15 however this analysis, using multi-collector ICP-MS, is much more expensive compared with other ICP-MS instrumentation.…”

Water-soluble Schiff base-actinyl complexes and their effect on the solvent extraction of f-elements

“…We postulate that the activity of the extracting form of the ligand (i.e., DEHP•HDEHP dimer) 34 at the organic-aqueous interface may be significantly reduced at this relatively high pH. 35 Neptunium speciation in the aqueous phase by visible-NIR spectroscopy As the extractability of neptunium varies widely with oxidation state, 36,37 the extraction behaviour of Np is best addressed in the context of its redox chemistry in solution. To examine the oxidation states of Np under conditions similar to the extraction studies, optical spectroscopic studies of solutions resembling the aqueous phase were undertaken.…”

Determination of plutonium isotopes in waters and environmental solids: A review

“…Several extraction reagents have been reported for the separation and preconcentration of Pu including TBP (tri-butyl phosphate), TIOA (triisooctylamine)-xylene [51,75], TTA (thenoyltrifluoroacetone)-benzene [74], HDEHP(di-2(ethylhexyl)-phosphoric acid) [76,77] and TOPO (tri-n-octylphosphine oxide) [78]. For instance, Norisuye et al [74] …”