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KMID : 0352720080320020127
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Journal of Ginseng Research
2008 Volume.32 No. 2 p.127 ~ p.134
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Effects of pH and High Temperature Treatment on the Changes of Major Ginsenosides Composition in Korean Red Ginseng Water Extract
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Choi Keum-Hee
Song Kyung-Bin
Kwak Yi-Seong
Rhee Man-Hee
Hwang Mi-Sun
Kim Seok-Chang
Park Chae-Kyu
Han Gyeong-Ho
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Abstract
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This study was carried out to investigate the changes of ginsenosides composition in Korean red ginseng water extract (RGWE) after heated with high temperatures above . RGWEs were adjusted with pH 3.0, pH 7.0 and pH 10.0, respectively, and then heated at 100,110 and for 30 minutes by using autoclave. Total ginsenosides of RGWE treated with heating showed decreasing tendency when compared with control. By TLC analysis, decreasing effect of ginsenosides in RGWE were significantly observed in the acidic condition of pH 3.0, particulary. By HPLC analysis, total ginsenoside of control showed 1.89%, while those of RGWE treated with 100, 110 and showed 1.22, 1.05 and 0.97%, respectively. The ratio of protopanaxadiol (PD) to protopanaxatriol (Pr) saponins in control was 1.89, while that of PD/PT in treated RGWEs were level of 1.33 to 1.47. By the result of decreased ratio of PD/PT in RGWE, it was considered that PD type saponin such as ginsenoside, , -Rc and -Rd was more unstable than PT type saponin such as ginsenoside-Re and Rg against high temperature heating above .
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KEYWORD
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Korean red ginseng, water extract, high temperature treatment, pH, saponin compostion
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