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复混肥中钾含量,一般采用四苯硼酸钾重量法和四苯硼酸钠容量法测定,这两种分析方法准确度较高,但分析时间长,不适合生产中间控制分析快速测定的需要。当复混肥中的钾由氯化钾提供,并且配料中未加入其它含氯原料,则可利用银量法测定复混肥中的氯含量,根据m( K2 O) /m( Cl)值一定
The content of potassium in compound fertilizer is generally determined by potassium tetraphenylborate gravimetric method and sodium tetraphenylborate volumetric method. These two methods are more accurate, but the analysis time is longer, which is not suitable for the rapid determination of intermediate control analysis. When the potassium in the compound fertilizer is provided by potassium chloride and no other chlorine-containing raw materials are added to the ingredients, the chlorine content in the compound fertilizer can be measured by the silver content method and the chlorine content in the compound fertilizer is determined according to the value of m (K 2 O) / m (Cl) for sure