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

  title={Comparison of different extraction techniques for isolation of antioxidants from sweet grass (Hierochloe odorata)},
  author={D. Grigonis and P. Venskutonis and B. Sivik and M. Sandahl and C. Eskilsson},
  journal={Journal of Supercritical Fluids},
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… Expand
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