Question

Describe why extractive values are useful in evaluation of crude drugs.
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Answer 1

Explanation:

Determination of water soluble and alcohol soluble extractive is used as a means of evaluation of the crude drugs for the presence of active constituents in the plant material. This method determines the amount of active constituents extracted with solvents from a given amount of herbal material.

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Answer 2

Extractive values are useful for evaluation of crude drugs and give an idea about the nature of chemical constituents present in them. The amount of extractive a drug yields to a given solvent is often an approximate measure of a certain constituent or group of related constituents the drug contains.

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