中文摘要：

采用无溶剂微波辅助提取与微波水蒸气蒸馏法提取薄荷叶和花椒挥发油,气相色谱-质谱（GC-MS）分析挥发油化学成分,与传统的水蒸气蒸馏对比,考察了微波对挥发油化学成分的影响。结果表明,微波促使薄荷叶挥发油中的薄荷醇氧化,转变为长叶薄荷酮和少量的薄荷呋喃酮。花椒挥发油中的桉油素等化合物受质子的催化,在长时间温度较高的提取条件下重排转变为α-里哪醇。微波提取时间大于50～70min,对该重排有促进作用;微波提取时间小于50min,该重排反应几乎不发生。无溶剂微波辅助提取由于提取速率快、提取时间短（40min）,在一定程度上避免了该重排反应,得到较多的桉油素,而水蒸气蒸馏得到较多的重排产物α-里哪醇,微波水蒸气蒸馏介于二者之间。

英文摘要：

Essential oil from mentha hapioealyx briq and zanthoxylum bungeanum maxim was extracted by solvent free microwave extraction（SFME） and microwave assisted hydro-distillation（MAHD）,and GC/MS was used for the qualitation and quantification analysis for the chemical composition in the essential oils.Hydrodistillation（HD） was compared to study the contribution of microwave to the composition changes in the extraction process.The experimental results showed that microwave can promote the menthol from the essential oil of mentha hapioealyx briq oxidized into pulegone and slight mint furanone.The eucalyptol from the essential oil of zanthoxylum bungeanum maxim would be transformed to α-linalool through arrangement reaction catalysis by proton in high temperature environment for a long time.When the microwave action time was exceeded 50-70 min,above arrangement reaction would be promoted.When action time of microwave was less than 50 min,above arrangement reaction almost did not be observed.Microwave can speed up the extraction,especially for SFME.By microwave method,the extraction time is so short（40 min） that above rearrangement was avoided and more eucalyptol was obtained.In comparison with microwave method,more rearrangement product of α-linalool was obtained by HD method,and MAHD is the medium of above two methods.