The volatile oils had a strenthen repellency.

这些植物性物质来源广泛,可直接应用于谷物、子、料等储藏物害虫的防治.

Methods: The volatile oils was extracted by steam-stilling and was identified by GC-MS. Calculated the percentage composition of the volatile oils according to Peak area normalization method.

方法：水蒸气蒸馏法提取挥发油，利用气相色谱-质谱联用（GC-MS）进行定性分析，按峰面积归一化法，求出挥发油中化学成分的百分含量。

Methods: GC-MS machine was used to analyze the chemical composition in volatile oils.

方法：利用GC-MS气质联用仪对香附炮制前后的挥发油进行成分分析。

Methods: GC - MS machine was used to analyze the chemical composition in volatile oils.

方法: 利用GC-MS气质联用仪对香附炮制前后的挥发油进行成分分析.

The monoterpenoids are dominant components in the volatile oils of plant species.

单萜类化合物是植物挥发油的主要成份。

The volatile oils of Zanthoxylum schinifolium were extracted by water vapor distillation.

采用水蒸气蒸馏法提取精制香椒子中的挥发油。

The results showed that the major components were sesquiterpenoid and terpenol of the volatile oils.

结果表明：轮叶蒲桃叶片挥发油主要为萜烯与萜烯醇类化合物。

The results show that terpene compounds in the volatile oils were identified. The higher chemical components in the volatile oil are camphene, pinene, phellandrene, zingiberene and borneol.

结果表明：生姜挥发油的主要化学成分是萜类化合物茨烯蒎烯水芹烯姜烯和冰片等。

Objective : To analyze the GC - MS fingerprint chromatogram of the volatile oils from Eupatorium fortunei with threemethods.

目的: 利用GC-MS分析了三种方法提取的佩兰挥发油指纹图谱.

GC/MS was used to compare the chemical components and their contents of volatile oils extracted from Fructus Piperis Longi by SD and SFE - CO2.

采用气相色谱- 质谱联用技术（GC/MS）对水蒸气蒸馏法（SD）和超临界CO2萃取法（SFE-CO2）所提取的荜茇挥发油化学成分及其含量进行分析。