1, packaging identification method. First, the inspection mark, the relevant state department regulations, fertilizer packaging must be marked on the product name, nutrient content, grade, trademark, net weight, standard code, factory name, site, production license number and other signs, such as the above signs do not or not Complete, may be fake fertilizer or poor fertilizer. The second is to inspect the sealing of the bags, and special attention should be paid to the chemical fertilizers with marked seals on the bags. This phenomenon may be adulterated. 2, burning identification method. Take a teaspoonful of fertilizer on burning red charcoal and burn it intensely. Observe the situation carefully. If the smoke is oversized and the smell of ammonia is ammonium nitrate, the sound of explosion is no potassium, and there is no ammonia smell; The smell of ammonia is phosphate rock. 3, qualitative identification method. To identify calcium superphosphate and calcium phosphate fertilizers, remove the two fertilizers and dissolve in a small amount of distilled water. Identify them with a wide pH test paper. The acidity is superphosphate, and the neutral is calcium-organic phosphate fertilizer; add 5%. The yttrium chloride solution produced a white precipitate, which was potassium sulfate. When 10% of nitrate was added, white floc was produced as potassium chloride. 4, water-soluble identification method. Take 1 g of chemical fertilizers for inspection, place them in clean glass tubes or glasses, and white porcelain bowls. Add 10 ml of distilled water or clean cold water to shake them completely to see the dissolution. All dissolved is nitrogen or potassium fertilizer; However, there are residues of superphosphate; soluble in water with no residue or little residue is heavy calcium phosphate; soluble in water but the ammonia smell is ammonium bicarbonate. 5, odor identification method. Odor can also be identified by smelling, if the liquid with strong pungent taste is ammonia water; the particles with obvious pungent ammonia odor are ammonium bicarbonate; the fine powder with sourness is heavy calcium superphosphate, such as superphosphate is very strong The pungent and sour taste indicates that waste sulfuric acid is likely to be used in the production process. This fertilizer is very toxic and can easily damage or burn off crops, especially in paddy rice ponds. 6, Yan Yan identification method. (1) Urea is white or yellow, granular, acicular or prismatic. (2) Ammonium sulfate is a white crystal. (3) Ammonium Ammonium Carbonate is white or other variegated powder or granular crystals. (4) Ammonium chloride is white or light yellow crystals. (5) Ammonium nitrate is a white powder crystal or white, light yellow spherical particles. (6) Ammonia is a colorless or dark liquid. (7) Lime nitrogen is grayish black powder. (8) Superphosphate is off-white or light complexion powder. (9) Heavy phosphorus calcium is dark gray, off-white granules or powder. (10) Calcium phosphate fertilizer is grayish brown or dark green powder. (11) Calcium, magnesium, phosphorus and potassium fertilizers are gray-brown or dark green powder. (12) Phosphate rock powder is gray, brown or yellow fine powder. (13) Nitrophosphate is a white granule. (14) Potassium sulfate is white crystals or powder. (15) Potassium chloride is white or light red particles. (16) Monoammonium phosphate is gray or dark gray particles. (17) Diammonium phosphate is white or light yellow particles. (18) Ammonium phosphate fertilizers are gray or dark gray granular formulations. In addition, in the production practice, farmers also have some methods for authenticating chemical fertilizers. It should be pointed out that although some chemical fertilizers are true, their contents are low. For example, the minimum standard for the available phosphorus content of superphosphate should reach 12%, and some of them should be only a few percent, and even 10% cannot be achieved. Fertilizers, such as compound fertilizers, each containing 15% of nitrogen, phosphorus, and potassium, can not be detected. Therefore, they are poor-quality chemical fertilizers, which have little effect on crops and cannot meet the needs of the nutrient elements in the growing period of crops.
1.Micro applicator with new flocking technology,100% make sure no fluff loss during use, transport and shipment .Four different sizes with various colors are also popular used in Beauty field.
2.Disposable 4 slot and 2 slot mixing wells,plays a necessary part during use of Micro applicators and bendabe brush,accurate mixing is the key of each treatment.
Microbrush
Disposable Micro Brush,Micro Applicator Brush,Bendable Dental Brush,Dental Disposable Brush
Tribest Dental Products Co., Ltd. , http://www.tribest-dental.com