How can i create an equation to calculate % assay of active ingredient inside any dosage form by using custom calculation if i have standard and test solution.

Question

% Assay = Area of test*Weight of Standard*potency of std.*Average weight of test*(100-loss of drying)/Area of standard*weight of test.

Mhawny · Accepted Answer

First , thanks alot for your answer 
 Secondly, i want to put my equation and its contents (variables) in custom calculation editor by using expression in custom calculation editor

martin.adams · Answer

Hello, 
 
 I understand that you want to use custom calculator for your expression. The question is where you are entering the various numeric values you will need for the calculations. I do not know for sure but possible locations are shown below. 
 
 Marty Adams 
 
 Area of test - Current injection peak area 
 Weight of Standard - Standard injections average calibration amount from method calibration table 
 potency of std. - Compound custom field 
 Average weight of test - ??? possibly sample amount if a single value or compound custom field if different for each analyte 
 (100-loss of drying) - sample or compound custom field 
 Area of standard - Standard injections average peak area - injections must be in the same result set for use in CC calculations. 
 weight of test - this one I am not sure about since you also have Average weight of test

Mhawny · Answer

First, i want to thank you for your response. 
 Secondly, till now i actually used your suggestion about sample and compound custom parameters for applying inside CC editor and the results are very good 
 Thank you

How can i create an equation to calculate % assay of active ingredient inside any dosage form by using custom calculation if i have standard and test solution.

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