薰衣草油提取和切割方法的研究

Study of Extraction and Cutting of Lavender Oil

以正己烷、丙酮为溶剂,分别采用溶剂萃取法和水蒸气蒸馏提取薰衣草油,通过GC/MS定性分析提取物组成。结果表明,溶剂萃取法的收率是水蒸气蒸馏的 5倍以上,且萃取物中乙酸芳樟酯含量高于后者,峰面积百分比达到 20%以上,但杂峰数量多;相对来说,丙酮提取物中的低沸点组分偏多,正己烷提取物中的高沸点组分偏多。水蒸气蒸馏提取物中芳樟醇的峰面积百分比达到 34%,樟脑的峰面积百分比超过 5%,均明显高于溶剂萃取。针对正辛烷 /正庚烷 /异戊醇模拟体系的水蒸气蒸馏实验表明,水蒸气蒸馏能优先提取混合物中低沸点、强极性组分,可用于薰衣草油的精制和切割。

Using n-hexane and acetone as solvents,lavender oil was extracted by steam distillation and solvent extraction separately,and the compositions of the extracts were determined by GC/MS.The results show that the yield of solvent extraction is more than5 times that of steam distillation,and the content of linalyl acetate are higher (>20% total peak area),but more species are there in the extract as well.Relatively,the acetone extract includes more components of lower boiling point,while it is opposite for n-hexane extract. Compared with solvent extraction,more linalool (>34% total peak area) and camphore (>5% total peak area) exist in the extract obtained by steam distillation.Experimental results in the simulated system of n-octane/n-heptane/isoamyl alcohol indicate that steam distillation could extract components of lower boiling point or higher polarity in preference,so it is possible to be applied for the cutting and purification of lavender oil.