声明
1. Introduction
2. Experimental
2.1 Chemicals and reagent
2.2 Plant material and Sample preparation
2.3 Extraction procedures
2.3.1 Gas purge microsyringe extraction (GP-MSE)
2.3.2 Steam distillation (SD)
2.3.3 Headspace liquid-phase microextraction (HS-LPME)
2.3.4 Headspace solid-phase microextraction (HS-SPME)
2.3.5 Ultrasonic extraction (UE)
2.4 GC-MS analysis
2.5 Characteristics for degradation product
3. Results and discussion
3.1 Optimization of GP-MSE
3.1.1. Influence of heater temperature
3.1.2. Influence of extraction solvent volume
3.1.3. Rapid extraction of essential oils using GP-MSE
3.2 Comparison of essential oils by different extraction methods
3.3 Relationship of essential oil content and sample amount.
3.4 Quantitative analysis of essential oils
4. Conclusion
致谢
参考文献
附 录 A