Determine drug quantity from ratio strength and volume
3. Percent, Ratio, mg/mL, PPM, PPB 3.2) Ratio 3.2.1) Ratio - General
3.2.1.1) Ratio - General Normal 1
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The strength of a medication is expressed as 1 : 570. Determine the quantity of drug in 200 mL of this product.
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lb equals 0.351 g kg
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1 : 570 means, 1 g of drug is present in each 570 mL of the solution.
To determine the gram amount of drug present in 200 mL of the solution we can write:
`(1 \quad g)/(570 \quad mL)=x/(200 \quad mL) therefore x = 0.351 ` g.
Answer.