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桐油是一种工业用油。因其含有的桐子酸（9,11,13-十八碳三烯酸）甘油酯是一种有毒、有害物质,所以,桐油绝对不准食用,否则,就会引起严重中毒。但是,由于桐油易干燥、无异味、色泽好、价格低,且与食用植物油（豆油、花生油）的感官性状极其相似,就有一些个体商贩在食用植物油中掺加桐油,用来炸油条、炸鸡等。如果食用了此类食品,就会引起食物中毒。对此,我们进行了研究,确定了油炸食品中桐油的快速检测方法。
Tung oil is an industrial oil. Because it contains the gallic acid (9,11,13-octadecatrienoic acid) is a toxic and hazardous substances, therefore, tung oil absolutely not allowed to eat, otherwise it will cause serious poisoning. However, because tung oil is easy to dry, odorless, good in color and low in price, and closely resembles the sensory traits of edible vegetable oils (soybean oil, peanut oil), some individual traders mix tung oil in edible vegetable oil to fry fries and fry Chicken and so on. If you eat these foods, it will cause food poisoning. In this regard, we conducted a study to determine the rapid detection of tung oil in fried foods.