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Comparison of different extraction techniques for isolation of antioxidants from sweet grass (Hierochloe odorata)

Grigonis, D; Venskutonis, P R; Sivik, Björn LU ; Sandahl, Margareta LU and Sparr Eskilsson, Cecilia LU (2005) In Journal of Supercritical Fluids 33(3). p.223-233
Abstract
Strong antioxidants, 5,8-dihydroxycoumarin and 5-hydroxy-8-O-beta-D-glucopyranosyl-benzopyranone were extracted from sweet grass (Hierochloe odorata L.) by using Soxhlet (SE), microwave-assisted (MAE) and supercritical fluid carbon dioxide (SFE) extractions at different extraction schemes and parameters. One-step MAE gave the most concentrated extract with 8.15% of 5,8-dihydroxycoumarin (extract yield 0.42%). Comparable results were obtained by one-step SFE and Soxhlet extraction. A two-step extraction was applied in order to increase the concentration of active compounds. Taking into account antioxidant recovery and concentration as well the extraction time and environmental aspects, two-step SFE was considered as a preferable method. The... (More)
Strong antioxidants, 5,8-dihydroxycoumarin and 5-hydroxy-8-O-beta-D-glucopyranosyl-benzopyranone were extracted from sweet grass (Hierochloe odorata L.) by using Soxhlet (SE), microwave-assisted (MAE) and supercritical fluid carbon dioxide (SFE) extractions at different extraction schemes and parameters. One-step MAE gave the most concentrated extract with 8.15% of 5,8-dihydroxycoumarin (extract yield 0.42%). Comparable results were obtained by one-step SFE and Soxhlet extraction. A two-step extraction was applied in order to increase the concentration of active compounds. Taking into account antioxidant recovery and concentration as well the extraction time and environmental aspects, two-step SFE was considered as a preferable method. The obtained crude extract contained 20.31% of 5,8-dihydroxycoumarin and 2.18% of 5-hydroxy-8-O-beta-D-glucopyranosyl-benzopyranone. The extraction yields were 0.46 and 0.06%, respectively. First-step of SFE extraction was performed from dried herb at 35 MPa and 40degreesC with 20% of ethanol as a modifier; the second extraction step was performed from the crude extract at 25 MPa and 40degreesC. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
sweet grass, extraction (MAE), microwave-assisted, soxhlet, supercritical fluid extraction (SFE), Hierochloe odorata, antioxidants
in
Journal of Supercritical Fluids
volume
33
issue
3
pages
223 - 233
publisher
Elsevier
external identifiers
  • wos:000227412400003
  • scopus:11144260109
ISSN
0896-8446
DOI
10.1016/j.supflu.2004.08.006
language
English
LU publication?
yes
id
8ab37328-4815-4210-90f8-7eb7e6577e39 (old id 250488)
date added to LUP
2007-08-07 13:33:20
date last changed
2017-05-28 03:49:13
@article{8ab37328-4815-4210-90f8-7eb7e6577e39,
  abstract     = {Strong antioxidants, 5,8-dihydroxycoumarin and 5-hydroxy-8-O-beta-D-glucopyranosyl-benzopyranone were extracted from sweet grass (Hierochloe odorata L.) by using Soxhlet (SE), microwave-assisted (MAE) and supercritical fluid carbon dioxide (SFE) extractions at different extraction schemes and parameters. One-step MAE gave the most concentrated extract with 8.15% of 5,8-dihydroxycoumarin (extract yield 0.42%). Comparable results were obtained by one-step SFE and Soxhlet extraction. A two-step extraction was applied in order to increase the concentration of active compounds. Taking into account antioxidant recovery and concentration as well the extraction time and environmental aspects, two-step SFE was considered as a preferable method. The obtained crude extract contained 20.31% of 5,8-dihydroxycoumarin and 2.18% of 5-hydroxy-8-O-beta-D-glucopyranosyl-benzopyranone. The extraction yields were 0.46 and 0.06%, respectively. First-step of SFE extraction was performed from dried herb at 35 MPa and 40degreesC with 20% of ethanol as a modifier; the second extraction step was performed from the crude extract at 25 MPa and 40degreesC.},
  author       = {Grigonis, D and Venskutonis, P R and Sivik, Björn and Sandahl, Margareta and Sparr Eskilsson, Cecilia},
  issn         = {0896-8446},
  keyword      = {sweet grass,extraction (MAE),microwave-assisted,soxhlet,supercritical fluid extraction (SFE),Hierochloe odorata,antioxidants},
  language     = {eng},
  number       = {3},
  pages        = {223--233},
  publisher    = {Elsevier},
  series       = {Journal of Supercritical Fluids},
  title        = {Comparison of different extraction techniques for isolation of antioxidants from sweet grass (Hierochloe odorata)},
  url          = {http://dx.doi.org/10.1016/j.supflu.2004.08.006},
  volume       = {33},
  year         = {2005},
}