Study on the Extraction Technology and Chemical Constituents of Essential Oil from Rosemary
The technology of extracting rosemary essential oil by steam distillation was optimized by single factor method and orthogonal test with rosemary dry leaves as raw materials.The results showed that the yield of rosemary essential oil reached 1.86％when the crushing time was 1 s,the distillation weight was 1 kg,and the distillation time was 30 min.By GC-MS chemical composition analysis,12 main chemical compositions of essential oils extracted from different habitats were identified,and the composition of essential oils from different regions was compared and analyzed.The composition of rosemary essential oils from different habitats was most similar to the Spanish type,but the composition of essential oils from different habitats was significantly different.It provides theoretical and technical support for the extraction and application of rosemary essential oil.
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