PPM related problem - Random question

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 Hard 1

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34 Kg of a solution contains 1346.4 mg of a therapeutic agent. Express the potency in parts per million (PPM) unit.

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lb equals 39.6 PPM kg

    PPM is the number of grams present per 1 million (1,000,000) grams of the mixture. In this case,
    Weight of drug = 1346.4 mg.
    This should be first converted to gram unit.
    `therefore` Weight of the drug in g unit = `1346.4/1000=1.3464` g.
    Total weight of the mixture = 34 Kg.
    Converting this weight into gram unit:
    Weight in g = `34 × 1000=34000` g.
    Using the formula for PPM, we can write:
    `(1.3464 \quad g)/(34000\quad g)=x/(1,000,000\quad g) therefore x = 39.6` g.
    Therefore, the potency is 39.6 PPM. Ans.

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