Component Analysis of Different Methods for Extracting Volatile Oils from Fructus Piperis Longi by GC/MS

GC/MS was used to compare the chemical components and their contents of volatile oils extracted from Fructus Piperis Longi by SD and SFE-CO₂. The appearance, yield, chemical components and their contents of volatile oil extracted by the two methods are different. SFE-CO₂ is superior to SD in raising yield and shortening extractive time， which is an ideal method for the extraction of volatile oil from Fructus Piperis Longi.