Abstract

Microwave extraction system equipped with closed vessels, which is known to rapidly extract target compounds from natural products, was applied to monitor the changes in phenolic compounds, browning color intensity and electron donating ability by using response surface methodology(RSM). Maximum content of phenolic compound was 21.65mg/100ml in 67.88% of ethanol concentration, 145oC of extraction temperature, and 6.24min of extraction time. The phenolic compounds in extracts are dependent on the increase of the extraction temperature and the ethanol concentration. Browning color intensity, which was maximized in 67.21%, 147oC, and 6.02min, was proportional to the increase of the extraction temperature. Maximum value of electron donating ability was 24.50units in 54.33%, 147oC, and 6.11 min. The electron donating ability of extracts was dependent on the increase of extraction temperature and maximized in the range from 50 to 65% of ethanol concentration.

Keywords

• grinseng;
• pressurized microwave-assisted extraction;
• phenolic compound;
• browning color;
• electron donating ability

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References

1. Understading of Korean Ginseng. The Society for Korean Ginseng SKG
2. Analytical Methods of Ginseng Components.Korea Ginsing & Tabacoo Research Institute KGTRI
3. Korean Ginseng. Korea Ginseng & Tabacco Research Institute KGTRI
4. Korean J.Food Sci.Technol v.9 Studies on the ginseng saponins.The patterns of ginseng saponin in the commercial ginseng plant Kim, H.J.;Nam, S.H.;Fukura, Y.;Lee, S.K
5. J.Korean Agric.Chem.Soc v.20 Saponins of Korean ginsing C.A.Meyer(partⅡ) Choi, S. H
6. J.Korean Agric.Chem.Soc v.20 Saponins of Korean ginseng C.A.Meyer(partⅢ) Choi, S.H
7. Korean J.Ginseng Sci v.8 Study of of extraction methods of saponin in ginseng products Sohn, H.J.;Jang, J.G.;Lee, K.S.;Kim, J.G.;Lee, Y.W
8. Korean J.Ginseng Sci v.6 Comparative studies on the chemical components in ginseng.The ginsensodies and the free sugars content of various ginseng plant Kim, M.W.;Lee, J.S.;Choi, K.J
9. Korean Food Standard Code.The Korean Ministry of Health and Welfare KMHW
10. Microwave-assisted process: a new tool for the analytical laboratory.In"Trends in Anlytical Chemisty" v.13 Pare, J.R.J.;Belanger, J.M.R.;Stafford, M.R
11. J.AOAC Intl v.79 Microwave assisted extraction as an alternative to Soxhlet,sonication,and surercritical fluid extraction Lopez-Avila, V.;Yorng, R.;Teplitsky, N
12. J.Korean Soc. Food Sci.Nutr v.28 Optimization of extraction conditions for soluble ginseng components using microwave extraction system under pressure Lee, S.B.;Lee, G.D.;Kwon, J.H.
13. Methods for analysis of musts and wine Amerine, M.A.;Ough, C.S
14. J.Korean Aric.Chem.Soc v.24 Quality changes in ted ginsing extraxt during high temperature storage Choi, J.H.;Kim, W.J.;Yang, J.W.;Sung, H.S.;Hong, S.K
15. Nature v.181 Antioxidant determinations by the use of a stable free radical Blios, M.S
16. Response surface methodology,Allyn and Bacon Inc. Myers, R.H
17. J.Food .Sci. v.57 Edible wheat gluten films:Influence of the main process variable on film properties using response surface methodology Gontard, N.;Guilbert, S.;Cuq, J.L
18. User's Guide Version 6.(4th.ed) v.2 SAS:SAS/STAT
19. The Mathematica Handbook, compatible with Mathematica Version 2.0 Martha, L.A.;James, P.B
20. J.Korean Agric.Chem.Soc v.32 Isolation of phenolic antioxidnant components from Panax ginsing Wee, J.J.;Park, J.D.;Kim, M.W.;Lee, H.J
21. Optimization of microwave-assisted extraction for effective components of Panax ginseng C.A.Meyer Kwon, J.H.;Lee, S.B.;Lee, G.D.;Kim, H.K
22. Korean J.Food Sci. Technol v.25 Effect of ethanol concentration on index components and physicochemical characteristcs of cinnamon extracts(in Korean) Kim, N.M.;Yang, J.W.;Kim, W.J
23. Korean J.Food Sci.Technol v.30 Optimization of extraction conditions for ethanol extracts from Chrysanthemum morifolium by response surface methodology(in Korean) Park, N.Y.;Kwon, J.H.;Kim, H.K
24. Korean J.Ginseng Sci. v.19 Browning reaction of fresh ginseng (Panax ginseng C.A Meyer)as affected by heating temparature Lee, J.W.;Lee, S.K.;Do, J.H.;Sung, H.S.;Shin, K.W
25. J.Korean Agric. Chem.Soc. v.24 Antioxidant activity of Panax ginseng browning products Kim, S.D.;Do, J.H.;Oh, H.I