I have read that when I want to make an extract for green coffee bean I can use 70% Ethanol for 2 hours , but I have some questions:
1. What's the best solvent to make the extract without losing the phenolic Acids?
2. Does this method extract caffeine as well?
3. What's the volume of solvent here? What's the ratio to the coffee beans?
4. Will the yield of the extraction be solid or liquid?
1. 70% Methanol or ethanol is good for phenolics
2. Partitioned your extract with chlorofoem to extract caffeine
3. Solvent and plant material ratio should depend upon plant material
4. Calculate always dry yield by drying your extract using rotor vapor or freeze drying.
good,
that's mean Ethanol doesn't extract Caffeine also? I hope that because I don't need it in my extract!
where can I find the ratio of solvent volume for beans weight ? could you tell me?
** sorry I didn't understand the last answer! I think at the end of the time I should evaporate the solvent ,, so I thought the yield will be solid ?
I read the yield will be 13 g of extract (from 100g of beans)
do you work in this before?
Yes, at the end of the time you should evaporate the solvent, then you can get yield on dry weight basis.
Chloroform will work for caffeine.
Use 100g of your material (powdered) and extract with 500ml (thrice).
Hello,
You can use fluidized bed extraction with 70% ethanol and finally freeze drying.
50 gm beans, used 3 g glycerine and 180 g water combination and 20 ml ethanol, give you best results
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