桐油是一种不饱和脂肪酸的甘油酯。其分子中的双键易于断裂与氧结合,即氧化。被氧化后的桐油不能为乙醚所提取。所以,按理说桐仁含油率测定前的准备工作,应该在惰性气体,至少是在氢气或二氧化碳中进行。但目前大多数科研、生产单位尚缺乏这方面的设备, Tung oil is an unsaturated fatty acid glyceride. The double bonds in their molecules are apt to break and combine with oxygen, ie, oxidize. After the oxidation of tung oil can not be extracted for the ether. Therefore, it is reasonable to say that the determination of Tongren oil content before the preparatory work should be carried out in inert gas, at least in hydrogen or carbon dioxide. However, at present, most scientific research and production units still lack the equipment in this area,