The agricultural resources market is too complicated, so how to identify the true and false potassium dihydrogen phosphate?

For farmers, especially for vegetable growers and fruit growers, I believe they must be very familiar with potassium dihydrogen phosphate. As a kind of foliar fertilizer, potassium dihydrogen phosphate has the advantages of high purity, wide application, low dosage, fast absorption and safe use. It has a very significant effect in promoting seedling growth, protecting flowers and fruits, increasing the number of fruit pods, filling fruit seeds, increasing unit weight and improving products and quality. Compared with traditional fertilizers, potassium dihydrogen phosphate can be absorbed and utilized after being sprayed on crop leaves for half an hour, and the absorption and utilization rate is as high as 85%, while the absorption and utilization rate of ordinary fertilizers by crops is only about 3%.

In an article some time ago, I specifically introduced the use methods of potassium dihydrogen phosphate on different crops, and many readers also asked privately: There are too many fake potassium dihydrogen phosphate in the market, and they don't know how to distinguish the true from the false. They are often afraid of buying fake or substandard potassium dihydrogen phosphate, and some even try to buy fake potassium dihydrogen phosphate for crops cheaply, which has caused a lot of economic losses, so I want to ask how to buy real potassium dihydrogen phosphate.

In an article I wrote the other day, I introduced the self-made method of potassium dihydrogen phosphate, which can be used. On the other hand, today, I will tell you how to distinguish the authenticity of potassium dihydrogen phosphate in the market. I hope you will learn not to buy fakes in the future.

At present, all kinds of fake and shoddy potassium dihydrogen phosphate can account for more than 9% in the market. In addition to many fake potassium dihydrogen phosphate produced by white sugar, magnesium sulfate, ammonium bicarbonate and industrial waste salt, more than 6% to 7% of potassium dihydrogen phosphate are unqualified products with seriously insufficient content, and even some effective phosphorus and potassium content is directly zero! The method of distinguishing the true and false potassium dihydrogen phosphate is as follows:

1. Asking the price

The purity of potassium dihydrogen phosphate is very high, which is basically above 98% and 99%. Because of the cost of raw materials, the price of real potassium dihydrogen phosphate is relatively high. Take a bag of 4 grams in the market as an example, the price is basically around 12-14 yuan. If the price of potassium dihydrogen phosphate in agricultural stores is a few dollars a bag, it can basically be judged as fake and shoddy goods, so just leave, and don't spend three or two dollars to buy it cheaply.

Second, look at the content

On the outer packaging of real potassium dihydrogen phosphate, the content is generally marked under the five characters of potassium dihydrogen phosphate, and the content is generally marked as -52-34. The phosphorus pentoxide (P25) and potassium oxide (K2) in high-quality potassium dihydrogen phosphate are ≥ 51.6%. If the content figure is the first standard,

Third, look at the packaging

1. For the real potassium dihydrogen phosphate, there must be five Chinese characters of potassium dihydrogen phosphate on the outer packaging, and it must be marked with the detailed production enterprise, address, telephone number and implementation standard (the old implementation standard is HG-2321-92 and the new implementation standard is HG-2321-216). If there is no enterprise and address, it is.

2. The genuine logo of potassium dihydrogen phosphate should follow the unified logo specification, and it will not and will not be randomly labeled. If the words such as imported, nanometer, high purity and compound are marked on the outer packaging, or the words such as rare earth, polypeptide, compound, synergistic, trace element, chelating, I, II and growth factor are marked, it can also be judged as a fake.

The packaging of true potassium dihydrogen phosphate is generally exquisite. If the packaging is rough and simple, the quality is poor and the logo information is unclear, it is basically fake.

3. The real potassium dihydrogen phosphate is all white crystalline or powdery solid components, and all bottled or bagged liquid potassium dihydrogen phosphate is all fake, because in the national implementation standard of potassium dihydrogen phosphate HG2321-92, there is no and no production of liquid potassium dihydrogen phosphate.

Fourth, look at the appearance of the particles

Most of the real potassium dihydrogen phosphate particles are long columnar white crystals with a size of two or three millimeters, so watch out for transparent, even and neat colors. If it is powder or light yellow, light yellow green or opaque colors, be very careful!

5. Taste it

The real potassium dihydrogen phosphate is colorless and tasteless. If you open a bag and put a few granules in your mouth or smell it in the bag, it is true that it has a light salty taste, but if it is very salty and bitter, or smells bad, ammonia or milk, it is a fake. Remember to spit out the potassium dihydrogen phosphate at the entrance after tasting it!

6. Burning with fire

The real potassium dihydrogen phosphate is burned with fire, and the flame is purple, and it will not smell of ammonia, but the fake will have a strong smell of ammonia.

VII. Sun exposure

The particle color and properties of real potassium dihydrogen phosphate will not change after exposure, but will change color after false exposure.

VIII. Observation of water solubility

The real potassium dihydrogen phosphate can be completely dissolved in water quickly without precipitation. If a little soda ash is added to the aqueous solution of potassium dihydrogen phosphate, it is the real product that bubbles and the fake product that flocs and precipitates.