1. Water-soluble method to take a little diammonium phosphate, into a white glass or white cup, add 50ml of water shaking a moment, after standing a few minutes, the insoluble is a cement product; turbid dark black fly ash products; upper clear The solution is more diammonium phosphate genuine; the lower turbidity is also more potassium nitrite. 4. The palm center test method has lower hardness and higher moisture absorption than diammonium phosphate particles. Under wet conditions, moisture in the air can easily absorb moisture and get loose particles. Therefore, it is desirable that the sample of diammonium phosphate be held in the palm of the hand for a while. The granule surface is easily wetted with nitrophosphate, and the dry sensation is cement or fly ash. The cooler sensation is diammonium phosphate. In addition, attention should be paid to not buying products from mobile vendors, and not buying diammonium phosphate with incomplete labels, rough packaging, and significantly low prices. After purchase and before application, a small amount of sample was taken for identification and comparison according to the above method. The problem was found to be promptly returned and reported to the relevant department to prevent loss and inconvenience after the application. Even if no inferior diammonium phosphate is found, the receipts after purchase and the used bags and a small amount of samples must be retained to prevent future problems. Portable 3 Ply Disposable Masks Non-woven Face Mask With Elastic Earloops Disposable Surgical Face Mask Dongguan Anmeixuan Electronic Technology Co., Ltd , https://www.hyashine.com
2. PH test paper to take a solution of diammonium phosphate aqueous solution for pH detection, diammonium phosphate was alkaline, pH value of 8 ~ 8.5. Phosphate fertilizer pH 6 ~ 7 is weakly acidic: the cement pH value of 9 ~ 10 was alkaline; fly ash PH value of 7 ~ 8 was weakly alkaline.
3. Section test method to take samples of diammonium phosphate cut with a knife from the middle of the particle, diammonium phosphate section is delicate and shiny, cement is not easy to cut, pulverized coal section is rough gray, nitrate phosphate section gray and dull.