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KMID : 0352720090330030194
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Journal of Ginseng Research
2009 Volume.33 No. 3 p.194 ~ p.198
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Variation of Phenolic Ingredient and Ginsenoside Content in Red ginseng Extract by Acid Treatment
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Kong Yeon-Hee
Rho Jeong-Hae
Cho Chang-Won
Kim Mi-Hyun
Lee Young-Chul
Kim Sung-Soo
Lee Pyeong-Jae
Choi Sang-Yoon
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Abstract
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The changes that would occur in a content of five phenolic ingredients and eight ginsenosides in acid-treatedred ginseng extracts were measured in this study. Acid-treated-red ginseng was prepared by treating with 1 M ascorbic acid or citric acid for 20 min. As a result, the contents of esculetin and quercetin in citric acid-treated-red ginseng increased by 3.5 times and 2.0 times, respectively, compared with control red ginseng. However, all phenolic ingredients decreased after treatment with ascorbic acid. In addition, the contents of ginsenoside Rg₃, Rh₂, Rd increased but those of Rb1, Rc, Re, Rf, Rg₁ decreased after acid treatment. Although these tendency of results are similar, the rate of change of ginsenosides in citric acid-treated-red ginseng was higher than in ascorbic acid-treated-red ginseng. These results indicated that citric acid is more effective in the conversion of ginseng ingredients than ascorbic acid.
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KEYWORD
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red ginseng, ascorbic acid, citric acid, phenolic compound, ginsenoside
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