The star anise oil in market come from Guangxi was analysised using GC/MS,Its main compound is trans-anethole that is over 90%,the others is less.

• 用气质联用（GC／MS）分析了市售八角茴香油的组成，发现产品中占近90%25的主要成分是反式-茴香脑，其他成分较少