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The aim of this paper is to carry out a deep study on the possibilities of using 99mTc from 99Mo-99mTc clinicalisotope generators to trace the radiochemical separations for 99Tc measurements by ICP-MS. By appropriatelyde®ning a minimum detectable mass concentration (MDMC) for the mass spectrometer it is possible toconclude that such use is acceptable for a wide range of activities of the tracer. The MDMC increases from0.41 to 0.51 ppt when the amount of 99mTc added to the samples ranges from 0 to 2 MBq. The purification ofthe final sample from Ru must be the main objective of the 99Tc measurement method, since its presencenoticeably enhances the 99Tc MDMC

The use of 99mTc as a tracer in the determination of 99Tc by ICP-mass spectrometry