Factors Affecting the Elution Yield

Long-lived Tc atoms pose an inherent isotopic impurity that is eluted from the column and is also generated in the eluate by radioactive decay of Tc. Since the concentration of Tc in the eluate is very low, chemical effects may result when generators are not eluted at regular intervals. The total mass of technetium ( Tc + Tc) in the 24-h eluate is calculated as 6.90x10 g/37 MBq (1 mCi). (For calculation of specific activity, see Appendix A2 of this chapter) 

For a given generator, the amount of Tc carrier atoms in the eluate is dependent on  

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