石墨消解-ICP-OES法同时测定赤泥中16种稀土元素

Simultaneous Determination of 16 Rare Earth Elements in Red Mud by Graphite Digestion-ICP-OES

采用硝酸-盐酸-氢氟酸-高氯酸对赤泥进行石墨消解,利用ICP-OES同时测定赤泥中的16种稀土元素,建立一套高效准确的稀土元素定量分析方法。使用基体匹配和内标法(Re)消除基体效应和补偿校正;研究共存元素对实验的影响。采用ICP-OES与ICP-MS两种方法分别测定几内亚赤泥中的16种稀土元素,两种方法测定结果基本一致。测定方法检出限、加标回收和精密度,在选定的条件下,方法检出限为0.00059 mg/L~0.06092 mg/L,加标回收率为95.2%~107.4%,相对标准偏差(RSD,n=8)为0.12%~3.57%,本方法的检出限低、线性范围宽、准确度高、操作简便快捷。

The red mud was digested by nitric acid,hydrochloric acid,hydrofluoric acid and perchloric acid with graphite,and 16 rare earth elements in the red mud were determined simultaneously by ICP-OES.An efficient and accurate quantitative analysis method for rare earth elements was established.Matrix matching and internal standard method(RE)were used to eliminate matrix effect and compensation correction.The influence of coexisting elements on the experiment was studied.16 rare earth elements in Guinean red mud were determined by ICP-OES and ICP-MS,and the results of the two methods were basically consistent.Under the selected conditions,the detection limit of the method is in the range of 0.00059 mg/L~0.06092 mg/L,the recovery is in the range of 95.2%~107.4%,and the relative standard deviations(RSD,n=8)is in the range of 0.12%~3.57%.The method has the advantages of low detection limit,wide linear range,high accuracy and simple and quick operation.