Comparison of different extraction techniques for isolation of antioxidants from sweet grass (Hierochloe odorata)
(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:
https://lup.lub.lu.se/record/250488
- author
- Grigonis, D ; Venskutonis, P R ; Sivik, Björn LU ; Sandahl, Margareta LU and Sparr Eskilsson, Cecilia LU
- organization
- publishing date
- 2005
- 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
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Analytical Chemistry (S/LTH) (011001004), LTH School of Engineering in Helsingborg (011045002)
- id
- 8ab37328-4815-4210-90f8-7eb7e6577e39 (old id 250488)
- date added to LUP
- 2016-04-01 12:34:11
- date last changed
- 2022-04-21 17:16:59
@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}}, keywords = {{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}}, doi = {{10.1016/j.supflu.2004.08.006}}, volume = {{33}}, year = {{2005}}, }