CALCULATIONS

% Impurity = CPM in Half of Strip X 100
                     CPM in Whole Strip

Labeling Efficiency = 100% - %HR TC - % Free Tc

What is the readiochemical purity of Tc-MDP for strips below??? 
Numbers represent "Counts per Minute" for each half of strip.

 

Answer:

Migration Patterns of Tc-MDP
Results:

% free Tc = 1,000/(1,000 + 99,000) = 1 %

% HR Tc = 1,000/(1,000 + 99,000) = 1 %

therefore,

% Tc-MDP = 100 % - 2 % = 98%