please help me with method of preparing an extract from the of roots withania somnifera , seeds of Cydonia oblonga, and leaves of urtica dioica.Also please suggest the best possible method.
It depends on the type of extract you want to prepare. For water/aqueous extracts, generally you can choose to boil the pulverised plant material and then freeze dry the extract, or you can soak the material in the water (cold maceration) overnight or longer, and freeze dry the liquid phase. For other organic solvents I think you need to do soxhlet extraction, and then use a rotary evaporator to remove the solvent.
Dear Researcher,
It is not clear , "What is the purpose of Extraction ?" but I assume it is a phyto chemical investigation. So please note below
1. Crush plant material (dried) up to powder.
2.Use soxlet apparatus for extraction. Extract plant material by increasing order of polarity i.e. Hexane,Pet.Ether,Chloroform,Ethyl Acetate,Acetone,Ethanol,Methanol and Hydro alcohol and finally water. at desire temperature.
3. Concentrate each and every fractions separately.
4. Go for column chromatography for further isolation of phytochemicals.
Please note Withania somnifera , Urtica are well researched herbs so review all articles before doing your experiments.
Good Luck.
@ajay sir...the purpose of extraction is herbal anti-cancer drug....any further suggestions. or book on extraction method that could be referred to.
If the purpose of extraction is to make extract for anticancer activity , Then please go through some literature attached here. Aq and Alcoholic extract found most effective of these herbs.
http://europepmc.org/abstract/med/9055640
http://pubs.acs.org/doi/abs/10.1021/jf903836k
http://www.sciencedirect.com/science/article/pii/S027869151200539X
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