Examination of a new quantification method of Zr isotopes in solid samples by LA-ICP-MS for Zr-93 analysis in difficult to dissolve radioactive wastes

Morii, Shiori  ; Yomogida, Takumi   ; Asai, Shiho*; Ouchi, Kazuki  ; Oka, Toshitaka   ; Kitatsuji, Yoshihiro  

New analytical method of a combination of laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) and isotope dilution mass spectrometry (IDMS) for quantification of Zr isotopes in a solid sample was investigated. Solid Zr-isotope reference was added to a simulated radioactive waste sample as a spike, then Zr isotope ratio was measured by LA-ICP-MS. As a result, we successfully quantify Zr isotopes in the simulated radioactive waste sample by new IDMS. There is a possibility that this new method can be applied for quantification of Zr-93 in difficult to dissolve radioactive wastes.