We know that it is often necessary to detect the content of protein in food industry, but the technology of directly measuring the content of protein is complicated and expensive, which is not suitable for large-scale promotion. Therefore, the industry often uses a method called "Kjeldahl method" to indirectly calculate the content of protein through the content of nitrogen atoms in food. That is to say, the higher the nitrogen atom content in food, the higher the protein content. In this way, this little-known melamine molecule contains a lot of nitrogen atoms, so it is of great use.
Attention, everyone, this sl milk powder incident was "polluted" by the cheapest 18 yuan bag of baby milk powder (at present, a bag of 400g milk powder for adults in supermarkets costs about 20 yuan, and the price of baby milk powder is estimated to be at least doubled). Obviously, sl has adopted a low-price dumping strategy and occupied the last fat meat in the rural milk powder market, but it is not enough to sell this 18 yuan bag of milk powder. So in order to save costs, sl added cheap soy protein powder to milk powder instead of milk powder. This soybean protein powder was not a big deal at first, but it was this time that melamine, a high-tech gadget forged in protein, was added, which finally created a nationwide sl milk powder incident. Of course, this high-tech gadget must be added to adult milk powder, because the metabolic ability of adults is much stronger than that of babies, and there will naturally be no poisoning incidents except for special patients.