Distillation extraction method is used for extracting the volatile constituents of the Herba Selaginellae. The average oil yield obtained is 2.85%.

报道了用水蒸汽蒸馏萃取法提取卷柏中挥发性物质，测得卷柏挥发油的含量为2.85%。

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The volatile constituents contents increased and the dissociation amino acids content declined with the adding of the yield.

在一定负载量范围内，挥发性物质含量随负载量增加而提高，游离氨基酸总含量随负载量增加而下降。

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