沙葱挥发油提取工艺的研究

文章对沙葱挥发油的提取工艺进行了研究,以沙葱粉为原料,采用水蒸气蒸馏法,在单因素试验结果与分析的基础上,以挥发油得率为指标,以浸泡时间(A)、料液比(B)、超声波处理时间(C)、蒸馏时间(D)为因素进行L9(34)正交试验,研究确定了提取沙葱挥发油的最佳工艺。试验结果表明,各因素影响沙葱挥发油提取率的程度由大到小的顺序为超声波处理时间>料液比=蒸馏时间>浸泡时间;最佳组合为A1B3C3D3,即浸泡时间1.5 h、料液比1:11、超声波处理时间20 min、蒸馏时间3.5 h。在此最佳工艺条件下提取率为0.46%。通过验证试验表明,所选的最佳提取工艺稳定、可行。

Studies on extracting technics of essential oils from Allium Mngolicum Regel

It is carried through research on extracting technics of essential oil from Allium Mngolicum Regel.In this paper using Allium Mngolicum Regel powder as raw material,adopting vapor distillation,on the base of result analysis of single-factor test,taking extraction yield of essential oil as target,the soaking time(A),ratio of materiol and water(B),Ultrasonic extraction time(C),distillation time(D) as factor making orthogonal expriment,the optimizing technics of extracting essential oil was built up.The result was shown that effect on extracting rate by different expriment factors,influence degree Ultrasonic extraction time,ratio of materiol and water,distillation time,soaking time in turn.The optimum combination was A1B3C3D3,that was to say,the optimized condition is soaking 1.5 h,adding water 11 times,Ultrasonic extraction time 20 min,and steam distillation 3.5 h.A maximum extraction yield of essential oil of 0.46% was obtained under the optimized conditions.The optimizing technics of extracting were steady and reasonable by validate test.