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


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The strength of a medication is expressed as 3.3 PPM. How many milligrams of the drug will 19 kilogram of this product contain?


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lb equals 62.7 mg kg

    3.3 PPM means, there is 3.3 g of drug in each 1,000,000 g of the mixture.
    19 kilogram means 19000 grams. Therefore, we can write:
    `(3.3 \quad g)/(1,000,000\quad g)=x/(19000\quad g) therefore x = 0.0627` g.

    Now, this g unit has to be converted to mg.
    `(1000\quad mg)/(1\quad g)= y/(0.0627\quadg) therefore y = 62.7` mg Ans.