The feasibility was discussed that adopting SCF-CO_2 to extract effective constituent(piceid,resveratrol and emodin)from Chinese herb Polygonum cuspidatum.

• 探讨了用超临界CO_2萃取中药虎杖中有效成分(白藜芦醇苷、白藜芦醇和大黄素)的可行性。