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 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.