In the past few days, Xiaobian introduced the self-made method and application method of potassium dihydrogen phosphate. As far as the dihydrogen phosphate on the market is concerned, there are too many potassium fakes, and I don’t know how to distinguish between true and false. I often buy them. Fake goods or insufficient content of the unqualified poor is very afraid, and some also cheap to buy fake potassium dihydrogen phosphate used on crops, resulting in no small economic losses. So let's talk about how to tell the truth about potassium dihydrogen phosphate in the market.
For farmers friends, especially for vegetable growers and fruit growers, I believe that they must be very familiar with potassium dihydrogen phosphate. As a kind of foliar fertilizer, potassium dihydrogen phosphate has high purity, wide application, low dosage, fast absorption and safe use, whether it is to promote seedling growth, preserve flowers and preserve fruit, increase the number of fruit pods, or full fruit seeds. Increased single weight, improved product and quality, etc., have very significant effects. Compared with traditional fertilizers, potassium dihydrogen phosphate can be absorbed and utilized after half an hour, and the absorption and utilization rate is as high as 85% or more, and the absorption and utilization rate of crops for common fertilizers is only about 30%.
The method for distinguishing true and false potassium dihydrogen phosphate is as follows:
First, ask the price
The purity of potassium dihydrogen phosphate is very high, basically 98%, 99% or more. Because of the cost of raw materials, the price of potassium dihydrogen phosphate is relatively high. Take the market of 400 grams, for example, the price is basically 14 dollars. about. If the price of potassium dihydrogen phosphate in a farmer's shop is a few dollars, it can be basically judged as counterfeit and shoddy goods. You can leave it directly. Don't buy three or two pieces cheaper.
Second, look at the content
On the outer packaging of potassium dihydrogen phosphate, the content is generally marked under the five large characters of potassium dihydrogen phosphate. The content is generally identified as 00-52-34, and the phosphorus pentoxide in high-quality potassium dihydrogen phosphate (P205) ≥ 51.6, potassium oxide (K20) ≥ 34%, if the content of the number, the first 00 marked with other numbers, or the latter two figures below 52, ​​34, then don't buy it!
Third, look at the packaging
1. Really potassium dihydrogen phosphate, there must be five Chinese characters of potassium dihydrogen phosphate on the outer packaging, and must be marked with detailed production enterprises, site, telephone and implementation standards (execution standard is HG-2321-92), if not If the company or the factory address indicates that it is a fake, you can try to call the phone on the bag to see if it can be opened. If it is not available, it is also a fake.
2, the true potassium dihydrogen phosphate logo should follow the uniform labeling specifications, and will not dare to arbitrarily mark the mark, if the outer packaging is marked with the words imported, nano, high purity, compound, or marked with rare earth, Polypeptide type, complex type, synergistic type, trace element type, chelation type, type I, type II, growth factor type, etc., can also be judged to be fake.
The true packaging of potassium dihydrogen phosphate is generally more exquisite. If the outer packaging is rough and simple, the quality is poor, and the identification information is unclear, it is basically a fake.
3. True potassium dihydrogen phosphate is a solid component of white crystal or powder. All liquid potassium dihydrogen phosphate in bottled or bagged is fake, because the national standard potassium dihydrogen phosphate is implemented in standard HG2321-92. There is no, and no, production of liquid potassium dihydrogen phosphate.
Fourth, look at the appearance of particles
Really potassium dihydrogen phosphate, the particles are mostly long columnar white crystals of two or three millimeters. The color is clear and uniform, and if it is powdery or light yellow, yellowish green, and opaque, be very careful!
Five, light taste
Really potassium dihydrogen phosphate is colorless and odorless. Open a bag and put a few granules in the mouth or smell the bag. It is true that there is a light salty taste, but if the salty taste is very heavy, bitter, or smells bad. , ammonia smell, milk flavor, then it is fake. Potassium dihydrogen phosphate at the entrance, you must remember to spit it out after a light taste!
Sixth, burning with fire
Really potassium dihydrogen phosphate is burned with fire, the flame is purple, and there is no ammonia smell, but the fake will have a strong ammonia smell.
Seven, sun exposure
Really potassium dihydrogen phosphate, the color and traits of the particles will not change after exposure, and will change color after the fake exposure.
Eight, water soluble observation
Really potassium dihydrogen phosphate can dissolve completely in water, and there is no precipitation. A little soda is added to the aqueous solution of potassium dihydrogen phosphate. The bubbling is the real thing, and the flocculation is fake.
At present, all kinds of counterfeit and potassium dihydrogen phosphate in the market can account for more than 90%, except for many counterfeit potassium dihydrogen phosphate produced by white sugar, magnesium sulfate, ammonium bicarbonate and industrial waste salt. The above potassium dihydrogen phosphate is a substandard product with a serious shortage of content, and even some effective phosphorus and potassium content is directly zero! So everyone must be careful to buy!
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