What is the concentration of a 5 ml eluate containing 863 mCi collected from a dry column generator?

To determine the concentration of the eluate, you need to divide the total activity of the collected eluate by its volume. In this case, the eluate volume is 5 ml, and the total activity is 863 mCi.

The calculation for concentration is as follows:

Concentration (in mCi/ml) = Total Activity (in mCi) / Volume (in ml)

Substituting the provided values:

Concentration = 863 mCi / 5 ml = 172.6 mCi/ml

Thus, the concentration of the eluate is 172.6 mCi/ml. This means that for every milliliter of the eluate, there is 172.6 mCi of the radiopharmaceutical present, which is essential for determining dosing and safe handling of the radiopharmaceutical in clinical settings.