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Jeong, Kyung Min; Lee, Min Sang; Nam, Min Woo; Zhao, Jing; Jin, Yan; Lee, Dong-Kyu; Kwon, Sung Won; Jeong, Ji Hoon; Lee, Jeongmi
Journal of Chromatography A, 12/2015, Volume: 1424Journal Article
•Tuneability and recyclability of DESs as extraction media were demonstrated.•A new strategy to design a ternary DES was developed for maximal extraction efficiency.•Complete recovery of extracted ginsenosides from DES was achieved through SPE.•The developed method was much greener and more efficient than previous methods. The present study demonstrates that deep eutectic solvents (DESs) with the highest extractability can be designed by combining effective DES components from screening diverse DESs. The extraction of polar ginseng saponins from white ginseng was used as a way to demonstrate the tuneability as well as recyclability of DESs. A newly designed ternary DES (GPS-5) composed of glycerol, l-proline, and sucrose at 9:4:1 was used as a sustainable and efficient extraction medium. Based on the anti-tumor activity on HCT-116 cancer cells, it was confirmed that GPS-5 was merely an extraction solvent with no influence of the bioactivity of the ginsenosides extracted. Excellent recovery of the extracted saponins was easily achieved through solid-phase extraction (SPE). Recycling of the DES was accomplished by simple freeze-drying of the washed solutions from the SPE. The extraction efficiencies of the DESs recycled once, twice, and thrice were 92%, 85%, and 83% of that of the freshly synthesized solvent.
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