How to tell whether flour is qualified or not

Flour is one of the staple foods that people can't live without, and its quality is closely related to health. So, when buying flour, how to distinguish the advantages and disadvantages of flour? The first is "look" to see if the package indicates the name of the factory, the date of production, the address, the shelf life and other items. Look at the color of flour, the color of high-quality flour is yellowish or milky yellow, and there are no black spots. Looking at bran star, it is allowed to mix a small amount of bran star into flour during processing, but too much is not good. Secondly, "taste", take a small amount of flour and put it in your mouth for about one minute. Bite a few times with your teeth. Flour that tastes good and doesn't stick to teeth is good. If it sticks to the teeth in your mouth and smells, it is inferior. There is a misunderstanding to distinguish the good from the bad flour, and it is wrong to think that the whiter the flour and products, the better the quality. Normal face powder is light yellow or milky yellow. Some people buy steamed bread to eat snow-white, and as a result, symptoms such as dizziness and nausea appear after eating it. This is because the whitening agent contained in flour exceeds the standard. Benzoyl peroxide is a flour whitening agent, which has the functions of deodorization and decoloration. It is soluble in organic solvents and insoluble in water. There is a violent reaction when encountering strong acid and alkali. It can irritate skin and mucous membrane, and also cause urticaria. In general flour processing, the maximum dosage can reach 0.006g/kg, and the benzoyl peroxide of unqualified flour seriously exceeds the standard. After entering the human body, it is decomposed in the body after 9- 15 hours and excreted. Long-term accumulation in the body will cause neurasthenia and other symptoms, and even damage the liver. In order to sell some inferior flour at a good price, benzoyl peroxide was added to the flour to make it white and bright. Be vigilant when buying, and choose carefully by watching and tasting, otherwise it will be harmful to your health.