[2H02-04] 分析技術1

[2H02] Development of chemical separation of Sn from concrete matrices using TEVA^® resin

*Van-Khoai Do^1,2, Takahiro Furuse^1,2, Yuki Ohta^1,2, Yuichi Sano^1,2, Hiroyuki Iwahashi^1,2, Shunta Homma^1,2, Yurina Ichijo^1,2, Kiyoko Kurosawa^1,2, Tsubasa Endo^1,2, Yoshiaki Motoki^1,2 (1. JAEA, 2. IRID)

キーワード：Radiochemical analysis, 126Sn, Solid phase extraction, TEVA® resin

Quantification of ¹²⁶Sn in concrete rubble by inductively coupled plasma mass spectrometry requires separation of the nuclide from an isobar (¹²⁶Te) and sample matrices. In the study, we developed an HCl-free procedure for recovering Sn from concretes. At first, Sn is coprecipitated with iron hydroxide. Or the solution sample is evaporated to dryness to remove nitrate. The obtained precipitate/or residue is then dissolved in hydrofluoric acid (HF) before Sn is retained on a commercial TEVA® resin column in the media of 0.5 M HF. Finally, Sn is eluted by 2M nitric acid. With the developed separation process, Sn was completely recovered from the synthetic concrete solution sample. The method development and characterization are discussed in detail in the presentation.