Pharmacognosy - medicinal plants (herbs)

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Theme VI: Extraction methods


Digestion is a form of maceration with slight warming during the extraction process, provided that the temperature does not alter the active ingredients of plant material and so there is greater efficiency in the use of menstruum.


The most used temperatures are between 35 ° and 40 ° C., although can rise to no higher than 50 ° C. This process is used with the tougher plant parts or those that contain poorly soluble substances.


We introduce the parts to extract in a container with the liquid pre-heated to the indicated temperatures, is maintained for a period that may vary between half an hour and 24 hours, shaking the container regularly.

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