Under normal storage conditions, peanut oil will undergo an auto-oxidation and rancidity process, and its changes are as follows: the auto-oxidation process is related to the season. If it is stored in winter, low temperature can effectively delay the reaction of lipase and oxygen. With the change of seasons and the rise of temperature, when the temperature is between 15-30℃, on the Por um lado, devido à ação da lipase, o óleo é hidrolisado e o valor do ácido aumenta ., por outro lado, a infiltração de oxigênio no ar promoverá a oxidação do óleo para formar hidroperóxidos .
In summer, the room temperature and the tank temperature exceed 30℃. If it is stored in an open-air oil tank or an open-air yard, it will be exposed to sunlight every day. In this case, environmental factors will accelerate the oxidation process of oil. Especially in the sunlight, under the action of ultraviolet rays or metal catalysts, when the radiation temperature Exceda 50 graus, peróxidos e hidroperóxidos se decompõem ainda mais e reorganizarão as moléculas em aldeídos e cetonas, tornando o petróleo armazenado .
