ZHANG Weiyun, LIU Fagui, ZHENG Yinan. Influence of alkaline hydrolysis conditions on contents of 4 rare ginsenosides[J]. Shanghai Journal of Traditional Chinese Medicine, 2018,52(12):101-104.
ZHANG Weiyun, LIU Fagui, ZHENG Yinan. Influence of alkaline hydrolysis conditions on contents of 4 rare ginsenosides[J]. Shanghai Journal of Traditional Chinese Medicine, 2018,52(12):101-104. DOI: 10.16305/j.1007-1334.2018.12.025.
Objective:To investigate the influence of different alkaline hydrolysis conditions on the contents of 4 rare ginsenosides including 20(S)-Rh,1, 20(S)-Rh,2, 20(S)-PPt, and 20(S)-PPd. MethodsHigh performance liquid chromatography-mass spectrometry (HPLC-MS) was applied to preliminarily infer the ginsenoside structure generated by alkaline hydrolysis of total saponin of ginseng stem and leaf. HPLC was adopted to determine the influence of different alkaline hydrolysis conditions, including reaction time, reaction temperature, amount of sodium hydroxide (NaOH), on the contents of ginsenosides 20(S)-Rh,1, 20(S)-Rh,2, 20(S)-PPt and 20(S)-PPd. Results:To obtain the high yield of ginsenoside 20(S)-Rh,1, and 20(S)-Rh,2, the condition was suggested as alkaline hydrolysis for 40 minutes, reaction temperature at 200 and 220 ℃ respectively and adding 2.0 g NaOH. To obtain the high yield of ginsenoside 20(S)-PPt and 20(S)-PPd, the condition was suggested as alkaline hydrolysis for 6 hours, reaction temperature at 240 ℃ and adding 2.0 g NaOH. Conclusion:The influence trend of reaction temperature in alkaline hydrolysis and amount of NaOH on the contents of ginsenoside 20(S)-Rh,1, 20(S)-Rh,2, 20(S)-PPt and 20(S)-PPd was similar, while the influence trend of reaction time was different.