复混肥中钾含量测定方法探讨

对火焰原子吸收法测定复合肥中钾元素含量的各种工作条件进行了探索研究.该方法选择钾元素的次灵敏线404.4 nm作为测定波长,并采取在试液中加入一定量的消电离剂氯化铯以有效抑制钾在乙炔-空气火焰中的电离,从而提高了样品测定数据的准确度和精密度,具有操作简单、检测快速等优点.与重量法相比,该方法具有明显的优势,适合于大批量...

Inquiry into Methods for Determination of Potassium Content in Compound Fertilizers

A probe is made into the work conditions for the determination of the potassium element content of compound fertilizers by the flame atomic absorption method. This method chooses the secondary sensitivity line 404.4 nm of the potassium element as the determination wave length, a definite quantity of the deionization agent, cesium chloride, is added into the test solution, to suppress effectively ionization of potassium in the acetylene-air flame and improve the accuracy and precision of the determination data of the sample, with advantages of simple operation and rapid detection. When compared to the gravimetric method, this method shows remarkable superiority, adaptable to the detection of a large batch of samples. Within the absorbence linearity range of the determination the standard deviation is less than 0.05%, the relative standard deviation （RSD） is less than 1.0%, and the indexed recovery is 98.0% - 102.0%.