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肉桂精油微膠囊中精油提取和測(cè)定方法的比較

發(fā)布時(shí)間：2019/11/4 15:43:03     瀏覽次數(shù)：834

肉桂精油微膠囊中精油提取和測(cè)定方法的比較
  
DOI：
中文關(guān)鍵詞: 微膠囊  總油  測(cè)定方法  混合溶劑提取

英文關(guān)鍵詞: microcapsule  total oil  determination method  mixed solvent extraction method

目的：比較4種肉桂精油微膠囊中總精油的提取方法，建立準(zhǔn)確的微膠囊總精油含量的測(cè)定方法；方法：用干燥失重法、揮發(fā)油測(cè)定法、紫外分光光度法和混合溶劑提取稱重法對(duì)肉桂精油微膠囊總精油含量進(jìn)行提取、測(cè)定，對(duì)這4種方法進(jìn)行對(duì)比分析。結(jié)果：比較4種方法測(cè)得同一種肉桂精油微膠囊的總精油含量，結(jié)果發(fā)現(xiàn)：干燥失重法和混合溶劑提取法回收率分別達(dá)84.16%和85.50%，干燥失重法的測(cè)量誤差（12.73%）大大高于混合溶劑提取法（3.74%），混合溶劑提取法重復(fù)性好且準(zhǔn)確率高，在提高精油投入量后，回收率可達(dá)80%以上。紫外分光光度法與揮發(fā)油測(cè)定法回收率低（分別為67.30%和66.50%），偏差也較高。紫外分光光度法操作繁瑣，相對(duì)成本較高，揮發(fā)油測(cè)定法操作簡(jiǎn)便、成本低，然而耗時(shí)較長(zhǎng)。結(jié)論：4種方法中以混合溶劑提取稱重法測(cè)得的精油準(zhǔn)確度高且重復(fù)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.