·2,447,543篇论文数据，部分数据来源于NoteExpress
方法采用水蒸气蒸馏法获得挥发油，经GC - MS技术结合计算机检索对其化学成分进行分离和鉴定，用色谱峰面积归一化法计算各组峰的相对含量。
METHODS The oils were extracted by steam distillation. The chemical compounds were separated and identified by GC-MS. The relative content of each component was determined by area normalization.
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