植物挥发性物质提取的一种简易方法--液氮冷凝法

介绍了植物挥发物提取的一种简易方法——液氮冷凝法。利用液氮的制冷原理对植物挥发性物质进行提取收集，当携带植物挥发性物质的纯净空气带动供试植物组织的挥发性物质通过一置有U形玻璃管的液氮罐时，由于液氮的低温作用，挥发性物质在U形管内壁上遇冷凝结。该提取装置简单，由硅胶柱、活性碳柱、流量计、锥形瓶、U形管、液罐及各种连接管构成，容易组装。利用该装置提取的挥发性物质可以用于生测，去除水分后还可用于电生理以及挥发性物质化学组成分析等。

A simple and convenient method for extracting plant volatiles-condensation by liquid nitrogen

A simple and convenient method for extracting plant volatiles condensates by liquid nitrogen is introduced.The volatiles were condensed on the inner wall of the U-tube which was inserted in the liquid nitrogen in nitrogen jar when the air be flowed through the tube.This device consists of silic gel column,activated charcoal column,flowmeter,conical flask,U-tube,nitrogen jar,air pump and the connected tubes.Volatiles extracted by this method could be used in bioassays,and also for electronic physiology and GC-MS analysis and so on when removing the water.