香柏精油的提取工艺研究

Study on extraction technology of essential oil from Thuja occidentalis L.

以香柏细枝叶为原料,采用NaCl溶液协同水蒸气蒸馏法对香柏精油的提取工艺进行研究。分别考察NaCl溶液浓度、液料比、浸泡时间以及蒸馏时间对香柏细枝叶精油提取率的影响,采用正交试验优化香柏细枝叶精油的提取工艺。结果表明:蒸馏时间是影响香柏精油提取率的主要因素,最佳提取工艺条件为:料液比1∶15、4%NaCl溶液、浸泡6 h、蒸馏3 h,在此条件下,精油提取率达到1.95%。

The synergistic extraction technology of essential oil from Thuja occidentalis L.leaves and thin trees was studied by using NaCl solution and steam distillation. Effects of concentration of NaCl solution, ratio of material to liquid, soaking time and distilling time were investigated through single factor and orthogonal test. The results showed the distilling time was the main factors on extraction rate of essential oil from Thuja occidentalis L..The optimized extraction technology was identified as follows：ratio of raw material to liquid was 1： 15 （g/mL）,concentration of NaCl solution was 4%,soaking time was 6 h, distilling time was 3 h. The extraction rate of essential oil was up to 1.95%.