Cotton oil can be detected by mixing cotton oil and sunflower oil. Personal database believes that it is impossible to directly judge whether cottonseed oil and sunflower oil contain cottonseed oil by simple ways such as appearance and smell. Chemical analysis techniques, such as gas chromatography-mass spectrometry, can be used to detect whether cottonseed oil is contained in the mixed oil. Sunflower seed, also called sunflower seed, is the fruit of sunflower. Its nuts contain 30%-45% fat, up to 60%. Sunflower seed oil is golden in color, clear and transparent, and fragrant in smell. It is an important edible oil. It contains a lot of unsaturated fatty acids such as linoleic acid, which can promote the regeneration and growth of human cells.