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Korean Ginseng roots were extracted with methanol-water, water and liquid and supercritical ammonia. The yields of the extracts by different methods are reported. The extracts were analyzed by high-performance thin-layer chromatography. Retention value factors of ginsenosides are tabellized. The absolute yields have been measured in mg ginsenoside per g ginseng root for the used standard ginsenosides. Formally the ammonia extraction at 334 K and 26 bar is found to be favourable. The supercritical condition of 418 K and 130 bar leads to a decomposition of the ginsenosides. Possibilities of fractionation by different solvents or different temperatures are indicated, but attempts are still required to get fractions of several extraction agents.

zeitschrift für naturforschung b

HPTLC-Analyse von Ginsenosiden zur Bewertung von Ginseng-Extraktionen mit Methanol-Wasser, Wasser oder Ammoniak / HPTLC Analyses of Ginsenosides for the Evaluation of Ginseng Extractions with Methanol-Water, Water or Ammonia