Abstract: The adsorption characteristic of total triterpenes in Akebia Trifoliata pericarp was researched by XDA-1 macroporous resin.Adsorption dynamics and thermodynamic parameters were investigated by pseudo-first-order,pseudo-second-order model,Van’t Hoff equation and adsorption isoatherms.The results showed that adsorption of total triterpenes by XDA-1 macroporous resin is pseudo-second-order kinetics equation.The adsorption isotherm is freundlich adsorption isotherm equation.Its enthalpy changes ΔH=-1.2792 kJ/mol,and is physical adsorption process.Gibbs free energy changes ΔG<0 indicated that the absorption is a spontaneous process.The entropy changes ΔS>0 demonstrated that the absorption process is the process of entropy increase.

Key words: Akebia Trifoliata, total triterpenes, macroporous resin, kinetics, thermodynamics