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Subcritical terpene extraction good or bad?

edited October 2018 in CO2 Extraction

Recently did a terpene run on some dried lavender at 1180psi and 42c (supercritical) and failed our RSA test for acetone. It's strange because we don't have any acetone in the building. So I'm thinking that we converted something with in the plant to acetone do to the amount of pressure and heat of a supercritical run. I would like to know if anyone has had this problem them selves? Is it possible to pull terpenes in a subcritical state? Do you find subcritical to be more beneficial for the terpenes? What parameters are you finding that give you the best results?


  • its too bad i didn't see this a while ago! Subcritical is the best way to extract terpenes from a plant (although i heard ethanol works very well too). you will have to refine the terps after extraction, as it might pull some chlorophyll/ other plant parts with it.

  • Ask your lab to re-test. It is possible for the lab to contaminate your sample when testing for residual solvents.

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