Abstract: The active ingredients of anti-Malassezia furfur were extracted by ultrasonic assisted extraction process from Portulaca oleracea L..The bacteriostatic effect was determined by the paper method,and the single factor test was used to explore the better extraction process by using the bacteriostatic effect as the index.Results show that when extraction temperature is 60 ℃,extraction time is 50 min,ratio of material to liquid is 1∶25 (g∶mL),and the ultrasonic power is 210 W,the extract has better bacteriostatic effect and the diameter of inhibition zone is (46.68±1.21) mm.Through physical and chemical reaction,the ingredients of purslane extract were preliminarily detected.Results show that there are alkaloids,saponins,proteins,peptides or amino acids and sugars in the purslane extract,and it may also contain tannins and phenols,flavonoids and triterpenes,while there are no organic acids.

Key words: anti-dandruff agent, Portulaca oleracea L., Malassezia furfur, extraction, antibacterial