怎么鉴别真假磷酸二氢钾

2025-03-21 05:03:28
推荐回答(4个)
回答1:

磷酸二氢钾辨别真假可以倒在水里看一看。
我们可以用一个透明的杯子,取一杯水,再取一勺子磷酸二氢钾放入水里,再加入一勺子食用碱,也加入水里。
当它们溶解的时候,若是发现有很多小气泡冒出,那就是真的,若是没有气泡或是气泡比较少,那就是假的或是不纯。

回答2:

如何鉴别磷酸二氢钾真假

回答3:

磷酸二氢钾是一种非常好的化学肥料,叶面喷施可以迅速补充磷钾肥,促进花芽分化以及果实膨大。

辨别磷酸二氢钾真假只需这五招!
1.“看”
首先要看肥料包装。国家有关部门规定,化肥包装袋上应注明产品名称、养分含量、等级、商标、净重、生产标准代号、肥料登记证号等标志;如果上述标志没有或不完整,可能是假化肥或劣质化肥。
2.“摸”
将肥料放在手心,用力握住或按压转动,根据手感来判断肥料。利用这种方法,判别美国二铵比较有效,抓一把肥料用力握几次,有“油湿”感的即为正品;而干燥如初的则很可能是用倒装复合肥冒充的。

3.“嗅”
通过肥料的特殊气味来简单判断。碳酸氢铵(碳铵)有强烈氨臭味;硫酸铵略有酸味;过磷酸钙也有酸味。而假冒伪劣肥料则气味不明显。

4.“烧”
将化肥样品加热或燃烧,从火焰颜色、熔融情况、烟味、残留物情况等进一步识别肥料。  (1)氮肥:碳酸氢铵,直接分解,发生大量白烟,有强烈的氨味,无残留物;氯化铵,直接分解或升华发生大量白烟,有强烈的氨味和酸味,无残留物;尿素,能迅速熔化,冒白烟,投入炭火中能燃烧,或取一玻璃片接触白烟时,能见玻璃片上附有一层白色结晶物;硝酸铵,不燃烧但熔化并出现沸腾状,冒出有氨味的烟。
(2)磷肥:过磷酸钙、钙镁磷肥、磷矿粉等在红木炭上无变化。
(3)钾肥:硫酸钾、氯化钾等在红木炭上无变化,发出噼叭声。
(4)复混肥:复混肥料燃烧与其构成原料密切相关,当其原料中有氨态氮或酰氨态氮时,会放出强烈氨味,并有大量残渣;磷酸铵类肥料能在红木炭上熔化发烟,并有氨味。

5.“溶”
将肥料颗粒撒于潮湿地面或用少量水湿润,过一段时间后,可根据肥料的溶解情况进行判断。如硝铵、二铵、硫酸钾、氯化钾等可以完全溶解(化),过磷酸钙、重过磷酸钙、硝酸铵钙等部分溶解;复合肥颗粒会发散、溶解或有少许残留物,而假劣肥料溶解性很差或根本不溶解(除磷肥)。

巴内达碧卡硅溶磷酸二氢钾,5秒即溶,5分钟吸收,是吸收最快的磷酸二氢钾。

回答4:

可以用硫酸亚铁来鉴别

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