电感耦合等离子体原子发射光谱法测定碳酸镧铈中铁  

Determination of iron in lanthanum cerium carbonate by inductively coupled plasma atomic emission spectrometry

作　　者：蔡伟亭 赵长玉 王安丽 荣文娜 宋君鹏 李贝 CAI Weiting;ZHAO Changyu;WANG Anli;RONG Wenna;SONG Junpeng;LI Bei(Tianjin Baogang Research Institute of Rare Earths Co.,Ltd.,Tianjin 300300,China)

机构地区：[1]天津包钢稀土研究院有限责任公司,天津300300

出　　处：《冶金分析》2024年第11期84-88,共5页Metallurgical Analysis

摘　　要：准确测定碳酸镧铈中铁元素的含量对其产品的质量控制及后续应用具有重要的意义。碳酸镧铈中铁元素的含量常采用分光光度法进行测定,但测定较低含量铁(0.3%以下)时存在变色不明显的问题,且显色过程极易受到其他杂质离子的影响。使用盐酸溶解样品,并控制溶液中盐酸酸度为2%。选择铁的分析谱线为Fe259.939nm,通过标准加入法绘制校准曲线消除碳酸镧铈基体等因素对于测定结果的影响,使用电感耦合等离子体原子发射光谱法(ICPAES)测定碳酸镧铈中铁。校准曲线线性相关系数为0.9999;方法检出限为0.001%。按照实验方法测定碳酸镧铈中铁,结果的相对标准偏差(RSD,n=11)为1.3%~3.3%,加标回收率为98%~103%。The accurate determination of iron content in lanthanum cerium carbonate is of great significance for quality control and subsequent application of its products.The content of iron in lanthanum cerium carbonate is commonly measured by spectrophotometry.However,when the iron content was low(below 0.3%),the color change was not obvious in the determination.Moreover,the coloring process is very easily affected by other impurity ions.In this study,the sample was dissolved with hydrochloric acid,and its acidity in solution was controlled at 2%.Fe 259.939 nm was selected as the analytical line for iron.The calibration curve was prepared by standard addition method to eliminate the influence of factors such as lanthanum cerium carbonate matrix on the determination results.The content of iron in lanthanum cerium carbonate was determined by inductively coupled plasma atomic emission spectrometry(ICP-AES).The linear correlation coefficient of calibration curve was 0.9999.The limit of detection of the method was 0.001%.The content of iron in lanthanum cerium carbonate was determined according to the experimental method.The relative standard deviations(RSD,n=11)of the measurement results were between 1.3%and 3.3%,and the spiked recoveries were between 98%and 103%.

关 键 词：电感耦合等离子体原子发射光谱法(ICP-AES) 标准加入法 碳酸镧铈 铁 

分 类 号：O657.31[理学—分析化学] TF031[理学—化学]