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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Compared with traditional extract method, ultrasound method could improve the extraction yield and save extraction time of paprika red.

与浸提法比较，超声提取极大地缩短了提取时间，而且收率有明显提高。

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It had maximal extraction yield of RCP with optimized technique parameters.

利用优化工艺参数提取红甘蓝色素时，具有最大的提取产量。

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