Aspergillus flavus exceeds the standard, and glucosinolate and erucic acid may also exceed the standard.

rapeseed is also a kind of food crop that is easily polluted by Aspergillus flavus. For example, if rapeseed is not dried sufficiently soon, it will grow mildew and be polluted by Aspergillus flavus. Aspergillus flavus is very easy to be infected in the cold and humid natural environment, so it is also the most easy to pollute the environment when it is obtained soon. In addition, poor storage in summer is also a high-risk link that causes Aspergillus flavus environmental pollution.

There are many impurities in oil pressed from soil, and it is easy to produce more harmful substances such as PM2.5 during cooking. The temperature at which oil begins to smoke is called the smoke point. The higher the smoke point, the less likely it is to smoke, and the less harmful substances are often produced during cooking. The smoke point is closely related to the amount of impurities it contains. Because there are many impurities in the pressed oil, the' smoke point' of the pressed oil is low, and it is easy to produce more substances. For example, the smoke point of soybean and peanut crude oil is generally only about 15~16℃, but it can reach above 23℃ after refining.