The Specific Activity Calculator accepts an input volume, activity, specific activity for a given isotope and calculates the amount of isotope present in the sample both in moles and moles/volume.
The Specific Activity Calculator is available by going to NucMed > Apect. Act. Calculator.
The Specific Activity Calculator requires several values to make its calculations. An activity, volume, isotope, and specific activity are used to calculate the number of excited molecules and molarity of a given sample.
|Activity||MBq, kBq, mCi, or μCi and measurement time.||Amount of isotope as measured in a dosimeter or with the NanoSPECT.|
|Volume||cm3, mm3, ml, μl||The volume containing the activity.|
|Isotope||Hours||The isotope of interest and its associated half-life. Several pre-defined options are available.|
|Specific Activity||MBq/pmol, kBq/pmol and measurement time.||The specific activity of the isotope being used as measured by a specific activity calibration. Specific activity describes the number of excited atoms out of the total atoms present in a given sample, i.e., the amount of the activity that has not yet decayed to a ground state.|
|Amount||pmol, nmol, or #||The calculated amount, or number, of excited molecules in the sample.|
|Molarity||pmol/ml, nmol/ml||The calculated molarity, or concentration, of excited molecules in a sample of activity.|