METHODS the essential oils were extracted by CO2 supercritical fluid extraction (SFE-CO2) method, then separated and identified by GC-MS.

方法采用CO2超临界流体萃取飞机草地上部分的挥发油，GC - MS法鉴定化学成分，归一化法测定各成分相对含量。

youdao

The volatile compounds of extracts obtained by SFE, steam distillation, soxhlet extraction and ultrasound extraction were analyzed by GC-MS. 37, 45, 27 and 37 compounds were identified respectively.

采用气相色谱-质谱联用技术(GC - MS)分析比较了超临界流体萃取法、水蒸气蒸馏法、索氏提取法及超声提取法所得提取物中的挥发性化学成分，分别鉴定出37,45,27及37种化学成分。

youdao