有机溶剂法提取化州橘叶精油工艺研究

Study on Organic Solvent Extraction Technology of Essential Oil from Exocarpium citrl Grandis,Pummelo Peel Leaf

以化州橘叶为原料,探讨有机溶剂法提取化州橘叶精油的最佳工艺。在单因素基础上选取试验因素与水平,根据中心组合Box-Behnken试验设计原理,采用了3因素3水平的响应面分析方法,以化橘叶精油得率为响应值,依据回归分析确定各个工艺条件的最佳水平。结果表明:化州橘叶精油提取的最佳工艺参数为:溶剂为石油醚;料液比为1∶60;提取时间为2.25h。结果:在最佳条件下,化橘叶精油提取率可达3.05%。此试验得到的化橘叶精油在常温下为橙黄色油状液体,色泽清亮透明,具有独特橘子香味。

To explore the optimal extraction technology for essential oil from Exocarpium citrl Grandis,Pummelo Peel leaf by organic solvent extraction .Experiment factors and levels were firstly selected by one factor tests .On the basis of the previous results and according to the central composite experimental design principles , the method of Response Surface Method with 3 factors and 3 levels was adopted .Then the optimal extraction tech-nological parameters were determined by means of regression analysis .Response surface and contour were final-ly graphed with the extraction rate as the response value .The results showed that：optimum conditions of essen-tial oil from Exocarpium citrl Grandis,Pummelo Peel leaf were as follows：the solvent of petroleum ether ,the ra-tio of material to solvent of 1∶60,and extraction time of 2.25h.The yield of essential oil from Exocarpium citrl Grandis,Pummelo Peel leaf was up to 3.05% under the optimum conditions .At normal temperatures ,the es-sential oil from HuaZhou orange leaf gained by the experiment is oily orange-yellow liquids ,which is clear and transparent in color with unique orange fragrance .