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一、氮肥尿素,碳酸铵,碳酸氢铵,硫酸铵、硝酸铵、氯化铵等氮肥外观上都是白色晶体,可用下列方法识别:1.灼烧法铵态氮肥受热以后都会发生分解,因此,鉴别时可将少量化肥放在铁皮上,在火焰上灼烧,如果产生较浓的具有刺激性气味的氨气,而且不留残渣即为纯度高的氮肥;如果残渣较多,说明含氮量低。2.溶解法铵态氮肥都是可以溶解于水的,因此可取少许化肥放入少量水中,如全部溶解,说明氮肥的纯度
A nitrogenous urea, ammonium carbonate, ammonium bicarbonate, ammonium sulfate, ammonium nitrate, ammonium chloride and other nitrogen are white crystals appearance can be identified by the following methods: 1. Burning method ammonium nitrogen fertilizer will be decomposed after the heat, so , Identify a small amount of fertilizer can be placed on the metal, burning in the flame, if produce strong irritating smell of ammonia, and without leaving a residue of high purity nitrogen fertilizer; if the residue is more, that contains nitrogen Low volume. 2. Dissolved ammonium nitrogen fertilizer can be dissolved in water, so a small amount of fertilizer may be placed in a small amount of water, such as all dissolved, indicating the purity of nitrogen