肉桂精油微胶囊中精油提取和测定方法的比较

发布时间：2019/11/4 15:44:27     浏览次数：1093

肉桂精油微胶囊中精油提取和测定方法的比较
  
DOI：
中文关键词: 微胶囊  总油  测定方法  混合溶剂提取

英文关键词: microcapsule  total oil  determination method  mixed solvent extraction method

 目的：比较4种肉桂精油微胶囊中总精油的提取方法，建立准确的微胶囊总精油含量的测定方法；方法：用干燥失重法、挥发油测定法、紫外分光光度法和混合溶剂提取称重法对肉桂精油微胶囊总精油含量进行提取、测定，对这4种方法进行对比分析。结果：比较4种方法测得同一种肉桂精油微胶囊的总精油含量，结果发现：干燥失重法和混合溶剂提取法回收率分别达84.16%和85.50%，干燥失重法的测量误差（12.73%）大大高于混合溶剂提取法（3.74%），混合溶剂提取法重复性好且准确率高，在提高精油投入量后，回收率可达80%以上。紫外分光光度法与挥发油测定法回收率低（分别为67.30%和66.50%），偏差也较高。紫外分光光度法操作繁琐，相对成本较高，挥发油测定法操作简便、成本低，然而耗时较长。结论：4种方法中以混合溶剂提取称重法测得的精油准确度高且重复性好。

 It aims to provide a scientific basis in determining amount of oil in microcapsules by comparing four extraction methods. The amount of cinnamon microencapsulation total oil was extracted and determined by weight loss method， simultaneous distillation-extraction method， ultraviolet spectrophotometry and mixed solvent extraction method. Then the four methods were compared and analyzed. The essential oil recovery percent determined by weight loss method and mixed solvent extraction method were 84.16% and 85.50%， respectively， but the weight loss method was subject to greater experimental errors （12.73%） than mixed solvent extraction method （3.74%）. mixed solvent extraction method has good reproducibility and accuracy， and the average recovery was over 80%. Ultraviolet spectrophotometry method and distillation method had low recovery （67.30% and 66.50%， respectively） and high experimental errors. Ultraviolet spectrophotometry method had complex operations and high cost. Distillation method was easy to operate and had low cost， but time-consuming was more. In conclusion， the mixed solvent extraction method had better precision and accuracy.