ICP-OES法测定镧铈金属及其化合物中稀土含量  

Determination of Rare Earth Contents in La-Ce Metal and La-Ce Compounds by ICP-OES

作　　者：曹俊杰 都业俭 李淑萍 薛建萍 张玉龙 刘志宏 CAO Jun-jie;DU Ye-jian;LI Shu-ping;XUE Jian-ping;ZHANG Yu-long;LIU Zhi-hong(Northern China Rare Earth(Group)High-tech Co.,Lid.,Baotou 014010,China;BaotouHuamei High-techREProducts Co.,Ltd.,Baotou 014010,China)

机构地区：[1]中国北方稀土(集团)高科技股份有限公司,内蒙古包头014010 [2]包头华美稀土高科有限公司,内蒙古包头014010

出　　处：《稀土》2022年第5期142-149,共8页Chinese Rare Earths

摘　　要：样品经硝酸-过氧化氢分解后,采用电感耦合等离子体原子发射光谱法(ICP-OES)测定镧、铈以及其他13种稀土杂质的含量。以基体匹配法消除主量镧、铈元素对稀土杂质的干扰。通过实验确定了各稀土元素的分析谱线,并实验了酸度、功率、共存离子对测定结果的影响。本方法测定范围:镧20.00%~40.00%,铈60.00%~80.00%,镨、钕、钐0.0040%~0.50%,其他稀土杂质0.0020%~0.50%。与X荧光光谱法及ICP-MS法对比结果基本一致,准确度较好,RSD≤4.3%。本方法可满足镧铈金属及其化合物中稀土含量分析检测的要求。Sample was digested in nitric acid and perhydrol. Contents of lanthanum, cerium and other 13 rare earth impurities in La-Ce metals and La-Ce compounds were determined by ICP-OES. Spectral interference of major elements lanthanum and cerium on rare earth impurities was eliminated by matrix matching. The best analytical spectral line was chosen through experiment. The effects of acidity, power and coexisting ions on the measured results were studied.The determination range of this method is 20.00% to 40.00% for La, 60.00% to 80.00% for Ce, 0.0040% to 0.50% for Pr, Nd, Sm and 0.0020% to 0.50% for other rare earth impurities.The results are basically consistent to that by X-Ray and ICP-MS. The method had good accuracy, relative standard deviation is less than or equal to 4.3%. It can meet requirements of determination for rare earth contents in La-Ce metal and La-Ce compounds.

关 键 词：ICP-OES 镧铈金属 镧铈化合物 稀土杂质 

分 类 号：O657.31[理学—分析化学]