Abstract: This article mainly investigated the chemical components of the essential flower oils of Cleistocalyx operculatus in Guangdong. Steam distillation extraction(SDE) and supercritical fluid CO2 extraction (SFE) were used to get the essential flower oils. The yields of volatile oils with the two methods were compared. GC-MS was used to analyze the chemical components of the essential oils with the two extraction methods. We found that the main components of the essential oils in Cleistocalyx operculatus flower extracted by the two different methods were nearly the same.

Key words: essential flower oils of Cleistocalyx operculatus, steam distillation extraction, supercritical CO2 fluid extraction, gas chromatography-mass spectrogram(GC-MS)