Supercritical fluid extraction of Bulgarian Achillea millefolium
Achillea millefolium L. (yarrow) from Bulgaria was extracted in a supercritical pilot-scale plant using carbon dioxide (CO). First, the extraction yield was studied as a function of time at 14 MPa, 40 °C and 70 g/min of CO. Then, the extraction time was set in order to study the effect of different process parameters (pressure, temperature, CO flow and use of ethanol as co-solvent) on the extraction yield. The composition of the volatile oil obtained in yarrow extracts was thoroughly studied by GC–MS. Overall extraction yield increased with pressure, temperature and amount of co-solvent. Nevertheless, minor effect of the studied process parameters on yarrow volatile oil profile was found. On the other hand, important differences were found when comparing the volatile oil composition of Bulgarian Achillea millefolium L. extracts with those obtained from other origins.
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | artículo biblioteca |
| Published: |
Elsevier
2017
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| Subjects: | Supercritical fluid extraction, Pilot-scale, Volatile oil, Yarrow, |
| Online Access: | http://hdl.handle.net/10261/150671 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/100012818 |
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