Determine weight of total content from PPM from the weight of the drug
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:
The potency of a preparation is 67.1 PPM. How many kilograms will this preparation weigh, if it contains 2482.7 mg of a drug?
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lb equals 37 Kg kg
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PPM is the number of grams present per 1 million (1,000,000) grams of the preparation or solution or mixture.
67.1 PPM means, there is 67.1 g of drug present in each million (1,000,000) g of the preparation.
Weight of drug = 2482.7 mg.
Converting it to grams `=2482.7/1000=2.4827` g.
Therefore, we can write:
`(67.1 \quad g)/(1,000,000\quad g)=(2.4827\quad g)/x therefore x = 37000` g.
Converting g into Kg:
`=37000/1000=37` Kg. Ans.