ICP-AES测定稀土钬铁合金中非稀土杂质元素钙、镁、铝、镍和锰含量

Determination of Ca,Mg,Al,Ni,Mn in Holmium-iron Alloy by Inductively Coupled Plasma Atomic Emission Spectrometry

建立了一种以近似基体匹配校正基体效应,电感耦合等离子体原子发射光谱仪(ICP-AES)测定稀土钬铁合金中的钙、镁、铝、镍和锰五种非稀土杂质元素含量的分析方法。通过对稀土和铁基体的影响实验,以及共存元素对稀土谱线的干扰实验,选择了基体及共存元素干扰少或无干扰的谱线作为分析线。最终采用近似基体匹配法:以铁(20%)与钬(80%)配制成混合基体以校正基体影响,确定了钬铁合金中钙、镁、铝、镍和锰五种非稀土杂质元素的测定的分析方法。方法各元素测定相对标准偏差(n=11)在1.00%~8.50%之间,方法加标回收率在90%~110%之间。试验表明方法操作简便,准确可靠,可用于稀土钬铁合金产品的检测。

A method for the determination of calcium,magnesium,aluminum,nickel,and manganese in rare earth holmium-iron alloys by inductively coupled plasma atomic emission spectrometer(ICP-AES)is established,the matrix interference is corrected by approximate matrix matching.Through the experiment on the influence of rare earth and iron matrix,the interference experiment of coexisting elements on the rare earth spectrum,the optimal analysis line is selected.The relative standard deviation(n=11)of the determination of each element in the method is between 1.00%and 8.50%,and the recovery of the method is between 90%and 110%.The test shows that the method is simple,accurate and reliable,and can be applied for the detection of rare earth holmium-iron alloy products.