STUDY OF THE ELUTION PROFILE OF THE TC-99M GEL GENERATOR

The generator with gel matrix is considered a perspective type for obtaining 99mTc. The elution yield of a generator and the course of the elution profile A(Vn) = f(Vn) are affected by the properties and conditions of preparation of zirconium molybdate (generator matrix). Furthermore, it is influended by neutron flux density as well as irradiation time and temperature of cooling water during the irradiation. Zirconium molybdate, Mo: Zr = 1.72, in the form of a monodispersion (mean particle size XBAR = 0.175 mm), was irradiated under the neutron flux density Q(n) = (0.7 ... 2.2) x 10(13) cm-2 s-1. The elution profile and the elution yield of 99mTc were examined in dependence on the temperature of drying the Zr-Mo matrix (40 - 100-degrees-C). The kinetics of the passage of 99mTc into the solution, in dependence on the temperature of drying the hydrogel, was investigated. Some predetermined substitutional functions were tested and the mechanism of the 99mTc passage into solution was explained.