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1. 外形、气味鉴别:液体,有强烈刺鼻气味是氨水。细粒,有明显刺鼻氨味是碳酸氢氨。细粉,有酸味,溶于水但有残渣是过磷酸钙,无渣或少渣是重过磷酸钙。黑灰色细粉,全不溶于水,有特殊腥臭味是石灰氮。 2. 全部溶解于水的是氮肥或钾肥;不溶于水、难溶于水或一部分溶于水而还有残渣的是磷肥。溶于水的化肥,另取一点放在烧红的炭上,剧烈燃烧有烟起火,有氨味是硝酸铵;爆响丝丝声,无氨味是氯化钾;无剧烈反应,但有氨味是硫酸铵;无反应是尿素或氯化铵。在火上无反应的化肥加石灰或草木灰无氨味是尿素,有氨味的是氯化铵。
1. Shape, odor identification: liquid, strong pungent odor is ammonia. Fine granules, with pronounced pungent amascine, are bicarbonate ammonia. Powder, sour, soluble in water but the residue is superphosphate, no residue or less slag is superphosphate. Dark gray powder, all insoluble in water, a special stench of lime nitrogen. 2. All dissolved in water is nitrogen or potassium; do not dissolve in water, soluble in water or part of the residue is dissolved in water and phosphate fertilizer. Dissolved in water, fertilizer, another point on the red burning charcoal, intense combustion of smoke, ammonia smell is ammonium nitrate; Explosion of the slightest sound, no ammonia smell is potassium chloride; no violent reaction, but there Ammonia taste is ammonium sulfate; no reaction is urea or ammonium chloride. No reaction to the fire on the fertilizer plus lime or ash with no ammonia is urea, ammonium ammonia is ammonia.