How to identify potassium dihydrogen sulfate is real or fake?

1. Identification from taste.

Buy potassium dihydrogen phosphate and open it to take a few grains and taste it, it is bitter is counterfeit potassium dihydrogen phosphate, it may be magnesium sulfate or waste salt of the chemical industry, it may be salty, it may be true, but the salty taste is very heavy, bitter, and similar to table salt, it may be sea salt, it is also fake. Real potassium dihydrogen phosphate is a faint salty taste, and potassium dihydrogen phosphate that can smell (foul smell, ammonia odor) is fake, because real potassium dihydrogen phosphate is white odorless crystals.

2. Simple experimental identification.

1. Take a little product and heat it on an iron sheet, dissolve it into a transparent liquid, and solidify it into a translucent glass-like substance after cooling. The appearance is white crystals or powders, take a small amount of exposure to the sun, and the properties and color do not change, which can be regarded as genuine, if it changes, it has to be doubted.

2. Take a glass, pour half a cup of warm water, put 50 grams of edible soda ash into the water, then stir until the soda ash is completely dissolved, take 10 grams of potassium dihydrogen phosphate and add it to the soda ash solution, if there are a large number of bubbles coming out, it is genuine; If there is a large amount of flocculent precipitation or other reactions, it means that it is a counterfeit and shoddy product.

3. Burning with fire, if there is a smell of ammonia, it is a fake and shoddy product, because the real product does not contain nitrogen.

4. Zinc sulfate and ferrous sulfate will be precipitated after adding zinc sulfate and ferrous sulfate to the aqueous solution of potassium dihydrogen phosphate, and if magnesium sulfate is used to falsify, the aqueous solution will not produce precipitation after adding zinc sulfate and ferrous sulfate.

The potassium dihydrogen phosphate market is chaotic, it is difficult to distinguish between true and false, many fruit farmers and friends have been deceived, and today in February, I will share with you the authenticity identification method of potassium dihydrogen phosphate!

The method of distinguishing the real from the fake with potassium sulfate is as follows:

1.Appearance identification method: the appearance of potassium sulfate is white crystals or powder, odorless and tasteless, soluble in water.

The appearance of real potassium sulfate products should be white, free of impurities, and odorless. If the color of potassium sulfate is not white, or there are impurities and odors, then it may be a counterfeit and shoddy product.

2.Chemical Identification Method:

Solubility of potassium sulfate: Add a certain amount of potassium sulfate sample to a certain amount of water, stir well, and observe whether it is completely dissolved. Real potassium sulfate products should be soluble in water, if potassium sulfate is found to be insoluble, or there is a precipitate, then it may be a counterfeit product.

Acidity and alkalinity of potassium sulfate: A certain amount of potassium sulfate sample is added to a certain amount of hydrochloric acid to observe whether there is hunger gas. The real potassium sulfate product should be gas-free, if it is found that there is gas production, then it may be a counterfeit product.

3.Instrument Identification Method:

Infrared spectroscopy: The potassium sulfate sample is detected by infrared spectrometer and its infrared spectrum is observed. Real potassium sulfate products should have a specific infrared spectrum, such as rotten socks and fruit found that the infrared spectrum is inconsistent with the real potassium sulfate products, then it may be counterfeit and shoddy products.

X-ray diffraction: The potassium sulfate sample is detected by an X-ray diffractometer and its X-ray diffraction pattern is observed. Genuine potassium sulfate products should have a specific X-ray diffraction pattern, and if the X-ray diffraction pattern is found to be inconsistent with the real potassium sulfate product, then it may be a counterfeit product.

In short, the correct identification of the authenticity of potassium sulfate requires the comprehensive use of a variety of methods, especially the instrument identification method can more accurately identify the authenticity of potassium sulfate.

1. Appearance identification method covers coarse potassium sulfate.

It is often grayish-yellow, gray-green or light brown, and does not absorb moisture.

2. Chemical properties.

Identification method The discriminator returns to the town of potassium sulfate, and 5% barium chloride solution can be added, and the white precipitate is potassium sulfate.

3. Solubility.

Potassium sulfate often contains some insoluble impurities, so the dissolution is not complete.

Fourth, the melting identification method puts the fertilizer on the iron sheet, burns it on the fire, and observes its melting condition. Potassium sulfate does not melt, but a purple flame characteristic of potassium ions can be observed.

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The following methods can be taken to identify the authenticity of potassium sulfate fertilizer: 1. Finger outer packaging identification method: mainly depends on whether the production license, fertilizer registration certificate and product qualification certificate are complete and effective.

2. Simple visual inspection method: special fertilizers are extruded and granulated or disc granulated through a set of complex procedures, and the color is gray-white or light gray, with little variegation, and the granulation is uniform, or round or cylindrical. Most of the fake and inferior chemical fertilizers are not deeply processed, they are made of shoddy or mixed in general, the color is not pure, and the granulation is uneven, and some are even not granulated, and they become flour.

3. Hand kneading feeling method: real potash fertilizer 1 is generally melted and cooled and granulated at high temperature, and then dried, with good stability, high hardness, and hardness performance 1, hand kneading is not easy to break, and it is not soft. The hardness of fake and inferior chemical fertilizers is poor, the hardness is not 1, and it is easy to form lumps by hand, or soft as mud.

4. Iron sheet burning method: a small amount of fertilizer particles (large or small) are burned on the red-hot iron sheet, which is not melted, odorless, and heated to produce a jumping phenomenon, which can be roughly determined as potassium fertilizer. If the iron sheet is tilted, so that the fat particles are directly burned by the high-temperature burning nuclear chain, there will be a colored flame, the golden shining flame is sodium, and the light yellow entrained light purple Weishi guess color flame is potassium.

There is also a type of powder in potash, which is brick red, light red or white in color. The identification method is also to burn on the iron sheet, and the potassium fertilizer is not melted and has no odor.

Hello, I know that I will answer for you wholeheartedly. 1.Potassium sulfate should be produced in accordance with the national standard GB20406-2006, excellent and first-class products require more than 50% potassium oxide, powdered qualified products require more than 45% potassium oxide, granular qualified products require more than 40% potassium oxide, and the potassium oxide content of Changlu counterfeit and shoddy products is not up to standard.

Many packages only indicate that the potassium oxide content is greater than 16%, 22% or 33%, which are non-conforming products. 2.Inclusion of other elements in the total nutrients confuses the standard, and if you don't pay attention to it, you mistakenly think that it meets the standard.

Such as k2SO4 50%. 3.In the name of the country?

Potassium sulfate is marked or the information of the importing country of the nominal raw material, etc., counterfeiting imported potash fertilizer. For example, "The American spine is in short supply?" Potassium sulfate" or" country of origin:

Russia: "Potassium sulfate is counterfeit imported fertilizer. 4.Imported fertilizers should be marked with "import contract number" on the packaging, while counterfeit potash fertilizers should be marked with "import and export enterprises **".

For example, "country of origin - Finland" potassium sulfate fertilizer. 5.The use of polypotassium sulfate according to the company's standard, and even the origin of the raw potassium, make consumers mistakenly think that it is an imported product.

For example, polysulfate with the label "Origin of Potash: Canada" is a counterfeit product. 6.

The product name does not match the implementation standard. Potassium sulfate adopts national standards, and counterfeit fertilizers mostly adopt enterprise standards or chemical industry standards. 8.

Potash fertilizers in all its forms. For example, the "potassium sulfate type" will be diluted, so that consumers think that the product is potassium sulfate. The packaging is marked with the import and export of the enterprise**, and at the same time marked with "provided by the ** company in the United States", which makes people mistakenly believe that the product is an imported product.

I hope it can help you and I wish you a happy life!