Sr-90 analysis using TIMS at NIRS, Japan

Radiostrontium measurement is possible using radiometric or mass spectrometry methods. Thermal Ionization Mass Spectrometer (TIMS) is a very sensitive device however it was not used to measure radiostrontium. Applying TIMS, three criterions have to be fulfilled:- adequate peak resolution- adequate abundance sensitivity- efficient chemical separation with high recovery.In our work the fulfillment of these criterions were tested and confirmed. The peak of the Sr-90 was distinguishable from the other Sr isotopes. The ion beam was stable resulting good quality plateau peak for Sr-90.The result of abundance test also was acceptable, m/z 90 relative to m/z 88 was