### PPM related problem - Random question

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 Hard 1

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How many milligrams of the active pharmaceutical ingredient will 48500 g of a preparation contain, if its strength is expressed as 61.6 PPM? Click on the button below to see the answer and explanations

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lb equals 2987.6 mg kg

61.6 PPM means, there is 61.6 g of drug in each 1,000,000 g of the mixture.
The total weight of the preparation = 48500 grams. Therefore, we can write:
(61.6 \quad g)/(1,000,000\quad g)=x/(48500\quad g) therefore x = 2.9876 g.

Now, this g unit has to be converted to mg.
(1000\quad mg)/(1\quad g)= y/(2.9876\quadg) therefore y = 2987.6 mg Ans.

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