Abstract: There are several kinds of barbaloin and its derivaites in aloe vera .Aloe possesses antiseptic power, antitumor and antibacterial imunity by the concerted reaction of those bioactive substances mentioned above.We applied spectrophotometric nethod to detect the total content of barbaloin in the hydrolysis of aloe vera gels .Relative standard deviation was 2. 39% and recovery 90. 1%. Thls method could be applied to the quality control of total barbaloin in health food containing aloe.

Key words: Aloe vera gel Barbaloin Spectrophocometric method