ICP-AES法测定六氟磷酸锂中21种杂质元素

在干燥气氛中准确称取1 g(精确至0.000 1 g)的LiPF₆样品，并用适量的碳酸二甲酯(DMC)进行溶解，再经过适当的处理后，用ICP-AES仪测定样品溶液中铍、铜、铅、钙、锆、钴、镁、钒、钛、钼、镍、锰、锶、锌、钾、铝、钡、镉、铁、铬、钠等21种杂质元素的含量。结果表明，21种元素的检出限在0.106～7.290 ng·mL-1之间，加标回收率为93.3%～102.1%，11次测定的RSD小于3.56%。方法操作方便，分析速度快，结果准确。方法已用于LiPF₆生产厂家的产品分析，完全满足要求。

Determination of Twenty One Elements in Lithium Hexafluorophosphate by ICP-AES

One gram (+/- 0.0001 g) of lithium hexafluorophosphate was weighed exactly under dry atmosphere and was dissolved with an adequate amount of dimethyl carbonate (DMC). After the sample solution was pretreated with a series of methods, Be, Cu, Pb, Ca, Zr, Co, Mg, V, Ti, Mo, Ni, Mn, Sr, Zn, K, Al, Ba, Cd, Fe, Cr and Na were determined by ICP-AES. The results show that the recoveries of standard addition were 93.3%-102.1%, and the relative standard deviations (n = 11) were 0%-3.56%. The method is efficient, accurate and easy to operate. It has been applied to the determination of lithium hexafluorophosphate products with satisfactory results.