1. Compare prices. The price difference between having and without alum is nearly 10 times.
The price of alum is very low, about a few cents per pound. If you do not use alum, you need to use food. Glue, emulsifier, edible wax and other additives are used to flocculate and brighten alum. The price of using alum is about two or three yuan per pound, while using other additives instead of alum can be sold for more than ten dollars. Yuan to twenty yuan per catty.
2. Look at the color. The color is bright and white if alum is present.
With or without alum added, there are still some subtle differences in appearance. For example, vermicelli produced from corn, mung beans, rice flour and other raw materials should be naturally white. If alum is used, the color will be significantly brighter and whiter.
3. To test the boiling resistance, soak in boiling water for five or six minutes.
If the vermicelli is not particularly thick, the vermicelli without alum will usually become significantly softer in five or six minutes. The hardness of vermicelli containing alum can also be clearly felt. In comparison, this method is the most reliable.
Extended information
The deep-fried dough sticks industry has national standards. As a food loosening agent, the alum added to the deep-fried dough sticks cannot exceed 100 mg per kilogram. However, although the content of vermicelli vermicelli is Addition is not allowed, but there is no detection of excessive content.
Alum, whose scientific name is potassium aluminum sulfate dodecahydrate, was once widely used in the puffed food industry. Alum, which was not regulated before, is no longer allowed to be added, mainly because the aluminum contained in alum can cause serious harm to the human body once consumed in excess.
Aluminum itself is easy to accumulate in the human body. For example, it may accumulate in the brain, kidneys, liver, spleen and other organs. If it accumulates in the brain, it can easily cause Alzheimer's disease, memory loss, and mental illness. symptoms such as decline.
People's Daily Online - Add alum to vermicelli to increase elasticity. Excessive intake can cause Alzheimer's disease and other diseases