稀土氟化物中氟的测定方洁研究

Study on the Determination of Content of Fluorine in Rare Earth Fluoride

摘要: 用稀土定量络合氟，EDTA测定剩余稀土，从而间接测定氟。研究了酸度、缓冲液对测定结果的影响，杂质元素干扰的消除条件。方法回收率在98.67%~100.45%之间，相对标准偏差小于0.21%。

Abstract: The Fluorine is combined with rare earth element quantitatively, the content of rare earth element is determinated by EDTA method, which could determinate the content of Fluorine.The effects of acidity and buffer solution on the result is studied, as well as the elimination condition for impurity interference.The rate of recovery is between 98.67% and 100.45%, the standard deviation is less than 0.21%.