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Optimal conditions for the supercritical carbon dioxide $(scCO_{2})$ extraction of glycyr­rhizin from licorice (Glycyrrhiza glabra) were investigated, with an emphasis on the types and levels of modifiers. The morphology of the licorice tissue remaining after the $scCO_{2} $ extraction of glycyrrhizin was examined by scanning electron microscopy, coupled with measurements of ab­solute density. Conventional organic solvent extraction was also carried out for purpose of quantitative comparison. At 50 MPa and $60^{circ}C$ glycyrrhizin could not be extracted with pure $scCO_{2}$, while a considerable amount of glycyrrhizin was extracted when water was added to $scCO_{2}$ as a modifier. The highest recovery was found to be about $97\%$ when $70\%$ aqueous methanol was added to $scCO_{2}$ at a concentration of $15\%$. The optimal pressure and temperature for the supercritical fluid extraction of glycyrrhizin were observed to be 30 M Pa and $60^{circ}C$, respectively. Under these conditions, the percentage recovery of glycyrrhizin attained a maximum value of 102.67\pm$ $1.13\%$ within 60 min. Furthermore, in the case of $scCO_{2}$ modified with $70\%$ aqueous methanol, the licorice tissue obtained after extraction was found to be severely de­graded by excessive swelling, and the absolute density of the licorice residues was observed to be the highest.

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이 논문을 인용한 문헌 (3)

  1. 2008. "" Biotechnology and bioprocess engineering, 13(6): 671~676 
  2. Lee, Seung-Mi ; Yun, Jun-Ho ; Chun, Byung-Soo 2011. "Fatty Acid Composition and Oxidative Properties of Anchovy Oil Extracted by Supercritical Carbon Dioxide" 청정기술 = Clean technology, 17(3): 266~272 
  3. Do, Jin-Sun ; Song, Shin-Young ; Cho, Ki-Jung ; Kim, In-Ho 2011. "Separation of Egg White Using HPLC with Change of Mobile Phase and Temperature" Korean chemical engineering research = 화학공학, 49(6): 829~834 


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