How to distinguish between true and false Sakefu fertilizers, and how to identify the true and false

1. Identification method of nitrogen fertilizer. If you buy ammonium carbonate, or ammonium nitrate, ammonium sulfate, or ammonium chloride, you can extract 10 grams of sample, put it in a clean glass, add 50 ml of water, stir and shake well, so that the fertilizer particles are completely dissolved.

After solution, dip a paper towel into a cup to dip the solution, let it dry slightly, and then bake on the stove for 2-5 minutes. If the strip of paper emits a pungent smell of nitrogen, it is one of the above-mentioned nitrogen fertilizers, otherwise it is a fake nitrogen fertilizer.

Second, use the fire method to simply identify several kinds of chemical fertilizers. Extract 15-20 grams of fertilizer samples, prepare a piece of very red charcoal that burns very vigorously (no open flame), and put the sample directly on the red-hot charcoal block.

The reaction phenomenon that occurred can be used to identify the type of chemical fertilizer: as soon as it comes into contact with carbon red, it immediately smokes and dissolves, which is urea; Ammonium nitrate is the one that burns violently, bursts out of the star, and emits the smell of nitrogen; There is no burning phenomenon, but it is emitted.

ammonia-flavored, ammonium sulfate; The one that has a popping sound but no ammonia odor is potassium chloride; combustible, which has a yellow flame when burned, is sodium nitrate; combustible, purple flame when burned, is potassium nitrate; It can burn slowly and leave white slag after burning, which is nitrate perch; It burns very slowly, smells of roasted chicken feathers, and black slag remains as bone meal. If none of the above reactions occur, it is a fake fertilizer.

3. Distinguish between true and false.

Fat. A pinch of compound fertilizer is placed on a piece of ground glass and observed under a 100-watt incandescent electric lamp. The fertilizer particles are shiny, and the lens is rich in refraction, which is a real compound fertilizer. The fat grains are dull in color, no.

Shiny, grayish-white on the outside, variegated on the inside, non-refractive, pseudo-fat. Put the sample in clean water, and what can be dissolved is the real compound fertilizer. What does not dissolve is fake fertilizer.

The ingredient content cannot be seen on the surface, so it is recommended to go to the Academy of Agricultural Sciences to make a test report, which does not cost much.

Summary. 1. Identification method of nitrogen fertilizer. If you buy ammonium carbonate, or ammonium nitrate, ammonium sulfate, ammonium chloride, you can extract 10 grams of sample, put it in a clean glass, add 50 ml of water, stir and shake well, so that the fertilizer particles are completely dissolved, dip a paper towel into the cup to dip the solution, dry it slightly, and then bake it on the stove for 2-5 minutes.

If the strip of paper emits a pungent smell of nitrogen, it is one of the above-mentioned nitrogen fertilizers, otherwise it is a fake nitrogen fertilizer.

Second, use the fire method to simply identify several kinds of chemical fertilizers. Extract 15-20 grams of fertilizer samples, prepare a piece of very red charcoal that burns vigorously (no open flame), put the sample directly on the red-hot charcoal block, and observe the reaction phenomenon.

Hello, I have seen your question and am sorting out the answer, please wait for a while First, the identification method of nitrogen fertilizer. If you buy ammonium carbonate, or ammonium nitrate, ammonium sulfate, ammonium chloride, you can extract 10 grams of sample, put it in a clean glass, add 50 ml of water, stir and shake well, so that the fat particles are completely dissolved, dip a paper towel into the cup to dip the solution, dry it slightly, and then bake it on the stove for 2-5 minutes. If the strip of paper emits a pungent smell of nitrogen, it is one of the above-mentioned nitrogen fertilizers, otherwise it is a fake nitrogen fertilizer.

Second, use the fire method to simply identify several kinds of chemical fertilizers. Extract 15-20 grams of chemical fertilizer samples, prepare a piece of very red charcoal that burns vigorously (no open flame), put the sample directly on the red-hot charcoal block, and observe the reaction phenomenon that occurs in the chong song book.

Shi Kefeng has no national color Tianxiang brand.