Multi-dimensional extraction chromatography of actinides for alpha and mass spectrometry

作者：Guerin Nicolas; Calmette Roxane; Johnson Thomas; Lariviere Dominic^*

来源：Analytical Methods, 2011, 3(7): 1560-1567.

DOI：10.1039/c1ay05086a

A multi-dimensional (MD) separation method using extraction chromatography for the analysis of actinides in environmental samples was developed and tested for alpha spectrometry and ICP-MS. Actinides (Th, U, Np, Pu and Am) were separated into individual fractions using two resins (TEVA/DGA), after valence adjustment initially in 9 M HCl, and in the second dimension, in 3 M HNO(3), in order to remove interferences and enable their proper identification and quantification. High separation purity for Th, U, Np, Pu and Am (respectively 98, 100, 94, 98 and 99 +/- 2%) were obtained. Reusability of the resins was also demonstrated (<= 9). The MD separation scheme was tested on spiked soil and sediment samples as well as on certified reference material (CRM-IAEA-384) dissolved using automated lithium metaborate fusion. Results obtained for actinides by alpha spectrometry and ICP-MS were in excellent agreement with those expected (absolute relative bias: 1.9-23%) and demonstrate the complementarily of the two types of detection.

• 出版日期2011-7