Optimization of Steam Extraction of Essential Oil from Platycladi Cacumen by Response Surface Methodology
Platycladi Cacumen is a traditional Chinese medicine,and its essential oil has antibacterial activity a-gainst a variety of spoilage bacteria and pathogenic bacteria,which is expected to be used as a natural antibacterial agent in the food industry and the field of medicine.In order to find the best extraction process of Platycladi Ca-cumen essential oil,and provide a scientific basis for future development and utilization,the essential oil of Platy-cladi Cacumen was extracted by steam distillation,and the extraction process was optimized by single factor ex-periment and response surface methodology.The results showed that the influence of each parameter on the ex-traction rate of Platycladi Cacumen essential oil was distillation time＞NaCl concentration＞material-liquid ra-tio.Considering the economic feasibility,the optimal extraction conditions were NaCl concentration of 2.3％,ma-terial-liquid ratio of 1:8.0 g/mL,distillation time of 2.0 h,and the actual extraction rate was 1.22％.
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