Radiochemical determination of technetium?99

Determination of technetium-99 in environmental material with rhenium as a yield monitor

“…Tc is probably the most satisfactory yield monitor for analysis of 99 Tc, provided that it can be obtained in a pure state (Chu and Feldstein, 1984). This is most easily achieved by the cyclotron bombardment of niobium with helium nuclei, thus: Unfortunately, the yield by this production route is rather low making the product expensive, particularly when its relatively short half-life is taken into consideration.…”

Determination of technetium by reduction of methylene blue with tin(II)

“…The most widely used measurement technique for technetium determination involves counting of the 0.292-MeV /3-ray of "Tc (5)(6)(7)(8). In these cases, excellent separation and purification of "Tc from all other ß contaminants are required.…”