Objective: To evaluate different methods by treating water-decocted liquid of 6 Chinese medical herbs and 4 co-prescription respectively with alcohol, ultrafilter, macroporousresin and clarifier.
Method: The contents of target component in those extracts were determined with HPLC or titration, and quantitative and qualitative determination of the impurity components, such as polysaccharide and protein, was made.
Result: Each method showed its advantages and disavantages.
Conclusion: Different method can be chosen according to the clinical and preparation demands or the characteristic of components.