Find drug weight from PPM and total quantity
3. Percent, Ratio, mg/mL, PPM, PPB 3.4) PPM and PPB 3.4.1) PPM, PPB - General
3.4.1.1) Drug weight from PPM and total Weight Easy 1
Total tried: Correct: Wrong:
How many milligrams of the active pharmaceutical ingredient will 5500 g of a preparation contain, if its strength is expressed as 18.7 PPM?
Click on the button below to see the answer and explanations
lb equals 102.85 mg kg
-
18.7 PPM means, there is 18.7 g of drug in each 1,000,000 g of the mixture.
The total weight of the preparation = 5500 grams. Therefore, we can write:
`(18.7 \quad g)/(1,000,000\quad g)=x/(5500\quad g) therefore x = 0.10285` g.
Now, this g unit has to be converted to mg.
`(1000\quad mg)/(1\quad g)= y/(0.10285\quadg) therefore y = 102.85` mg Ans.