[3D04-07] Analytical Technique 1

[3D05] Development of analytical method for interference-free determination of ⁷⁹Se in concrete by ICP-MS/MS

*Irvin Mardongan Banjarnahor¹, Van-Khoai Do¹, Yoshiaki Motoki¹, Yuki Ohta¹, Hiroyuki Iwahashi¹, Kiyoko Kurosawa¹, Takahiro Furuse¹ (1. Japan Atomic Energy Agency)

Keywords:Se-79, Difficult-to-measure radionuclides, ICP-MS/MS, Solid phase extraction

Pure beta-emitting ⁷⁹Se is one of the long-lived fission products that might release to the environment due to the nuclear accident at Fukushima Daiichi Nuclear Power Plant (FDNPP). A reliable and simple determination method of the radionuclide is important for proceeding the disposal of the wastes obtained from the decommissioning of FDNPP. We developed a new analytical procedure for the measurement of ⁷⁹Se by inductively coupled plasma triple quadrupole mass spectrometry (ICP-MS/MS). All interferences that potentially interfere in the measurement of ⁷⁹Se could be effectively removed by the chemical separation pretreatment and ICP-MS/MS. The method is tested with inactive concrete to verify the interference removal efficiency. Also, the analytical figures of merit such as detection capability etc. are reported.