Скачать или смотреть Pharmaceutics (10) = Percentage Calculations | How to Calculate W/V, V/V and W/W in Pharmaceutics

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Percentage Solutions: The concentration of a substance can be expressed in
the following three types of percentages:
1. Weight in volume (w/v): Required to express the concentration of a solid in liquid.
2. Weight in weight (w/w): Required to express concentration of a solid in solid mixture.
3. Volume in volume (v/v): Required to express concentration of a liquid in another liquid
1. Weight in volume (w/v)
In this case, the general formula for 1% (w/v) is : Solute 1 part by weight, Solvent up to 100 parts by volume. The formula is actually: Solute 1 g Solvent up to 100 ml
2. Weight in weight (w/w): Required to express concentration of a solid in solid mixture.
In this case, the general formula for 1% (w/w) is : Solute 1 part by weight, Solvent up to 100 parts by weight. The formula is actually: Solute 1 g Solvent up to 100 g
3. Volume in volume (v/v): Required to express concentration of a liquid in another liquid
In this case, the general formula for 1% (v/v) is : Solute 1 part by volume, Solvent up to 100 parts by volume. The formula is actually: Solute 1 ml Solvent up to 100 ml

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