查询词典 distillation

Objective To analyze the chemical components of the extracts of Kacmpferia galanga L from supercritical CO2 extraction, and to compare the extraction efficiency between supercritical CO2 extraction and traditional water distillation.

目的 研究沙姜超临界CO2萃取物的化学成分，并比较超临界CO2提取法和传统的水蒸气蒸馏提取法的提取效果。

METHODS: Galanga Resurrectionlily Rhizome volatile oil was extracted by wet distillation method and determined by GC-MS , and the relative content of different constituents was determined by chromatographic peak area normalization method.

采用水蒸气蒸馏法提取山柰挥发油，用气相色谱-质谱联用技术进行测定，并用色谱峰面积归一法确定各化学成分的相对含量。

Consists of many flavor components. We chose Kaempferia galanga L. planted in Yangjiang, Guangdong province as the sample and extracted the essence oil by enzyme-decomposing together with steam distillation.

本文选用广东阳春所产鲜沙姜用酶解法配合水汽蒸镏提取其中精油，并对此精油进行气相色谱-质谱分析，以确定广东阳春沙姜精油的成分及含量。

The difficulty of route is the refinement of products. There is a lot of sodium chloride in solution. In order to refine the glycolic acid, the methods of vacuum distillation and organic solvent extraction are adopted.

水解合成后得到的是羟基乙酸的水溶液，其中含有大量的氯化钠和少量未水解的氯乙酸及其它杂质，采用减压蒸馏及有机溶剂萃取方法进行精制是比较适宜。

ConclusionThe extraction rate of volatile oils from Heracleum hemsleyanum Diels by supercritical CO2extraction process is higher than that of water vapor distillation,and the optimized extraction conditions are:extraction pressure 25MPa,extraction temperature 45℃ and flow rate of CO2 20L/h, and the yield of volatile oils is 0.65%.

结果通过各因素级差大小的比较可知：萃取压力的变化对萃取率的影响最大，萃取温度次之，而CO2流量对萃取率的影响最小。结论超临界CO2萃取牛尾独活挥发油的萃取率较水蒸气蒸馏法高，最佳萃取条件为萃取压力25MPa，萃取温度45℃，CO2流量20L/h，挥发油收率为0.65%。

ConclusionMicrowave extraction has the highest yield in the shortest time. But volatile oil in Heracleum hemsleyanum Diels extracted by supercritical CO2 extraction or steam distillation has better quality.

结论微波萃取挥发油得率最高，时间最短；超临界CO2和水蒸馏法萃取挥发油的质量最好，因此使用超临界CO2是萃取牛尾独活挥发油的最佳途径。

ConclusionThe extraction rate of volatile oils from Heracleum hemsleyanum Diels by supercritical CO2extraction process is higher than that of water vapor distillation,and the optimized extraction conditions are:extraction pressure 25MPa,extraction temperature 45℃ and flow rate of CO2 20L/h, and the yield of volatile oils is 0.65%.

超临界CO2萃取牛尾独活挥发油的萃取率较水蒸气蒸馏法高，最佳萃取条件为萃取压力25MPa，萃取温度45℃，CO2流量20L/h，挥发油收率为0.65%。

ConclusionMicrowave extraction has the highest yield in the shortest time. But volatile oil in Heracleum hemsleyanum Diels extracted by supercritical CO2 extraction or steam distillation has better quality. Thus the supercritical CO2 extraction is the best way.

结论微波萃取挥发油得率最高，时间最短；超临界CO2和水蒸馏法萃取挥发油的质量最好，因此使用超临界CO2是萃取牛尾独活挥发油的最佳途径。

Traditionally, it was produced with husked rice and Baiqu as essentials through liquid fermentation and distillation.

台湾米酒是台湾岛固有的一种用大米酿造的蒸馏酒，与大陆南方诸省所产米酒的工艺有所不同。

F. based on gas chromatography-mass spectrometer method. Essential oil from cultivated variety Inula racemosa Hook. f. was extracted by steam distillation and analyzed by applying GC-MS.

方法］采用水蒸气蒸馏法从藏木香栽培品种中提取挥发油，并用GC-MS联用仪对其挥发油的化学成分进行研究。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。