What is the total activity of 8 ml of Tc99m eluate with a concentration of 2.0 MBq/ml?

To determine the total activity of the Tc99m eluate, you need to use the formula that relates concentration to total activity. The activity (in megabecquerels, MBq) can be calculated by multiplying the concentration of the solution by the volume of the solution.

In this case, the concentration of the Tc99m eluate is 2.0 MBq/ml, and you have a volume of 8 ml. The calculation will proceed as follows:

1. Start with the concentration: 2.0 MBq/ml.

2. Multiply this concentration by the volume of the solution: 2.0 MBq/ml * 8 ml.

3. Performing this calculation gives:

• 2.0 MBq/ml * 8 ml = 16 MBq.

Thus, the total activity of 8 ml of Tc99m eluate is correctly determined to be 16 MBq. This calculation clearly shows how the concentration and volume are coupled to yield the total activity, leading to the correct answer.