title: Stability kinetics of ginsenosides in aqueous solution.
abstract: The stability of ginsenosides (Rb1, Rb2, and Rg1) in aqueous solutions of varying pH was studied kinetically at 37 degrees C and an ionic strength of 0.15, using reverse-phase high-performance liquid chromatography. Degradation readily occurred by a proton-catalyzed reaction, the half-lives being only approximately 30 min at pH 1. However, under neutral intestinal pH conditions, the degradation was almost negligible throughout the experimental period (approximately 40 h).
mesh_terms: D004355:Drug Stability; D036145:Ginsenosides; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D007700:Kinetics; D012503:Saponins; D012996:Solutions
chemical_list: D036145:Ginsenosides; D012503:Saponins; D012996:Solutions