Infusion and Decoction Techniques of Extraction

 

Infusion and Decoction
 Techniques of Extraction

Infusion

—  In Infusion technique extraction of drug is carried out from powder crude drug by using hot or cold water.

—  Powdered crude drug will be soaked in hot or cold water for specified time period.

—  Stirring may or not be involved.

—  After specified filtration is carried out.

—  After filtration the marc will be pressed so that remaining solvent comes out.

—  Extraction is carried out again with the help of fresh hot or lukewarm water.

Decoction

—  In decoction concentration is carried out by boiling.

—  Powdered or whole crude drug is boiled with water as a solvent.

—  Boiling would be continued for minutes to hours depending upon the drug to be extracted.

—  After the completion of specified time filtration is carried out.

—  Decoction technique of extraction for the drugs that are  water soluble.

—  Similarly the drug must also be stable upon exposure to high temperature for long period of time.

Presented By

Muhammad Atif

PhD Scholar Pharmaceutical Sciences AWKUM

Manager QA Decent Pharma islamabad