Saponin Composition and Physico-Chemical Properties of Korean Red Ginseng Extract as Affected by Extracting Conditions
2008
Lee, S.H. (Natural House RnD Center, Seoul, Republic of Korea), E-mail: [email protected] | Kang, J.I. (Natural House RnD Center, Seoul, Republic of Korea) | Lee, S.Y. (Natural House RnD Center, Seoul, Republic of Korea)
In this study, the composition of saponin and physico-chemical properties of Korean red ginseng extract was analyzed based on various extracting conditions. The total saponin and individual ginsenoside concentration of the red ginseng extract showed a decreasing trend as the extracting temperature and time increased; also, the extracting condition at 75℃ for 24 hours showed the highest concentration. In contrast, the concentration of Rg₃ increased as the extracting temperature and time increased within the particular range. It was suggested that a certain part of ginsenosides changes to Rg₃ according to extracting conditions; thus, the concentration of Rg₃ increased. Physico-chemical properties of Korean red ginseng extract based on the extracting conditions were different compared to those for saponin; so, as the extracting conditions were different compared to those for saponin; so, as the extracting temperature and time increased, brix and color difference increased but pH decreased indicating stabilization of the overall quality of the product. Therefore, the most appropriate extracting condition for both the product quality of Korean red ginseng extract and stable extraction of saponin was 80℃ within 48 hours, minimizing the loss of ginsenosides.
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