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Weighing by the Aliquot Method
Using the smallest whole number value possible for the multiplication factor (MF), quantity of drug to actually weigh (QAW), and aliquot weight (AW):
What weight in milligrams (mg) of lactose should be used to weigh 22 mg of Losazole Gluconate with a possible weighing error of not greater than 4% using an analytical balance having a 6 mg sensitivity requirement (SR)?
Note: Least Weighable Quantity (LWQ)   =   $\frac{SR\enskip *\enskip 100\%}{Error \enskip \%}$
ANSWER (round to nearest whole number)
 
Weight of Lactose (DW) = mg