Influence of the Generator in-Growth Time on the Final Radiochemical Purity and Stability of ^99mTc Radiopharmaceuticals

Table 7

Evaluation of total technetium amount in ^99mTc eluates coming from a generator with ⁹⁹Mo calibrated activity of 10 GBq, at different times by previous elution.

Time by the previous elution	Amount of total Tc calculated	^99gTc/^99mTc ratio calculated	Amount of total Tc found	^99gTc/^99mTc ratio found
72 h	0.30 𝜇g	11.84
48 h	0.22 𝜇g	6.50	0.22±0.01	6.68±0.31
36 h	0.18 𝜇g	4.34
24 h	0.13 𝜇g	2.54	0.12±0.01	3.23±0.15