The Preparation of ~(169)Er-FHMA

The natural abundance Er2O3 is taken as the target,irradiated by reactor,and generated 169Er(NO3)3 solved in HNO3. In the medium of 0.9% NaCl,FeSO4,NaOH and the stable reagent of PVP is added while be keeping the definite acidity. The 169ErFHMA(Fe(OH)3 polymer) is gained after the dispersal by supersonic. The size of particles is 3～8 μm, the temprature is no effect on dissolve rate of 19ErFHMA in 0.9% NaCl solution.