The simplest true and false urea identification method

Wang engineer:
I am a big grain producer and use a lot of urea every year. However, in recent years, some unscrupulous sellers have used fake fakes. I have been able to distinguish between real and fake urea and have been on several occasions. To ask others about the method of distinguishing between true and false urea, the East sentence can not remember the sentence. . Is there no easiest way to identify true and false urea?

Anhui Zhangzhou Zhao Ansheng

Mr. Zhao Ansheng:

There are several methods used by farmers in my hometown to easily identify true and false urea. These methods can be summarized as: one inspection, two observations, three smells, four touches, five burns, and six scales. I will introduce it to you for your reference.

A check. Check the production lot number and seal of the package. The genuine urea is generally packaged on a bag with a clear batch number and a machine seal that is folded on both sides. The production batch number on the fake urea package is unclear or not, and most of them are manually sealed by a single line.

Second look. True urea is a translucent and uniform colorless particle. If the surface color of the particles is too bright or dark, or appears to be significantly reflective, it is mixed with impurities.

Three smells. The urea produced by regular manufacturers has no volatile odor under normal conditions, but can only produce ammonia odor after being wet or subjected to high temperature. If the volatile odor is strong under normal conditions, the urea contains impurities.

Four touches. The true urea particles have the same size, strong fluidity, and are not easy to agglomerate, so the hand feel is good, and the fake urea has a burning sensation and a tingling hand when touched.

Five burns. Pure urea is quickly melted on the red charcoal, which emits white smoke and has an ammonia smell. If there is intense burning on charcoal, strong light, and with a 'beep' sound, or melting is not enough, it must be mixed with impurities.

Six scales. The urea produced by regular manufacturers generally differs from the actual weight by less than 1%.

China Chemical Industry News

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