[1B04-07] Analytical Technique

[1B05] Interference removal for high-sensitivity rapid analysis of ¹⁰⁷Pd in radioactive rubbles by ICP-MS / MS

*Hiroyuki Iwahashi^1,2, Van-khoai Do^1,2, Takahiro Furuse^1,2, Yuki ohta^1,2, Shunta Homma^1,2, Kiyoko Kurosawa^1,2, Yoshiaki Motoki^1,2, Takashi Hirosawa^1,2 (1. Japan Atomic Energy Agency, 2. International Research Institute for Decommissioning)

Keywords:107Pd, 107Ag, ICP-MS/MS, solid-phase extraction

The radiometric determination of beta emitting ¹⁰⁷Pd (half-life of 6.5 million years) requires a multiple-step chemical separation and a time-consuming radioactive measurement. Inductively coupled plasma tandem mass spectrometry (ICP-MS/MS) with recent technological advances in interference removal by two quadrupole mass filters and a collision/reaction cell could be an alternative for highly sensitive analysis of long-lived radionuclides. In this study, we have developed an analytical method for the determination of ¹⁰⁷Pd in concrete rubble by ICP-MS/MS combined with single-column chromatographic separation. The measurement condition was optimized to completely suppress the interference including the isobar ¹⁰⁷Ag and the sample matrices. The application of the developed method to radioactive concrete rubble is under consideration.