The essential oil from root of Cynanchum paniculatum(Bge.) Kitag was analyzed by SPME/GC/MS for the first time.

• 首次采用固相微萃取/气相色谱/质谱(SPME/GC/MS)联用技术对徐长卿根挥发油的成分进行分析,并用峰面积归一化法测定相对百分含量。