LiFePO4化学成分测定

建立了一套可用于实际电池及材料生产、研制的磷酸铁锂主体、杂质和添加剂的测定方法。采用氧化还原滴定法测定铁;磷钼酸铵沉淀返滴定法测定磷酸根;原子吸收法测定锂、钠、钾;ICP-AES原子发射法测定杂质钙、铅。在解决了磷酸铁锂的溶样方法问题、原子吸收法化学干扰问题、原子发射的基体效应及光谱干扰问题后,选定合适的分析条件,进行了方法的准确度和精密度实验,数据结果显示方法可以满足实际分析工作的要求。

Determination of chemical components in lithium ferric phosphate

The aim of this article is to build a system of determination of chemical components in lithium ferric phosphate,and the method can be used in researching and producing of battery and material.It is necessary to control the content of principal parts,impurities.The method of oxidation-deoxidization titration was used to determine iron;AAS to determine lithium,sodium and potassium;ICP-AES to determine calcium,lead.After solving the problems of dissolutions of sample;chemical disturbance in AAS;principal part effect and spectrum disturbance in ICP-AES,we studied accuracy.The data shows that the methods are enough for practical determination.