By way of distillation, volatile oil was extracted from Bidens. Bipinnata. L. and the volatile components in it were qualitatively analyzed and determined using the GC-MS method.

• 采用蒸馏煮提法对鬼针草挥发油进行了提取 ,并用GC MS法定性地分析了鬼针草中挥发性成分。