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Report No.

Sequential anion-exchange separation of trace U, Th, Pb and lanthanides in environmental samples

Miyamoto, Yutaka   ; Yasuda, Kenichiro   ; Magara, Masaaki  ; Kimura, Takaumi ; Usuda, Shigekazu*

Nano grams of U, Th, Pb and lanthanides in a geological reference rock were sequentially separated with a single anion-exchange column. Mixture of acetic acid, HCl and HNO$$_{3}$$ were used as the eluents for this separation. The recovery of these key elements was more than 95%, and there was no fractionation among the recoveries of each lanthanide element. Alkaline metals, alkaline earth metals and Fe were effectively eliminated from the key elements. By using this technique, it is possible to simplify the complicated traditional processes without any special ligands, columns and equipments.



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