电感耦合等离子体发射光谱法测定离子型稀土矿混合稀土氧化物中三氧化二铁的含量  

Determination of iron trioxide content in Mixed Rare Earth Oxide of Ion-absorption Rare Earth Ore by ICP

作　　者：王金凤 Wang Jinfeng(Fujian Changting Golden Dragon Rare Earth Co,.Ltd.,Longyan 366399,Fujian;Fujian Shanhai Collaborative Innovation Center of Rare-earth Functional Materials,Longyan 366300,Fujian;Fujian Key Laboratory of Rare-earth Functional Materials,Longyan 366399,Fujian)

机构地区：[1]福建省金龙稀土股份有限公司,福建龙岩366300 [2]福建省稀土功能材料山海协作创新中心,福建龙岩366300 [3]福建省稀土功能材料重点实验室,福建龙岩366300

出　　处：《福建冶金》2024年第3期66-71,共6页Fujian Metallurgy

摘　　要：离子型稀土矿作为生产氯化稀土和氧化稀土的最重要的原材料之一,其质量影响着后端稀土萃取分离效果及氧化物的品质。铁是离子型稀土矿中最常见的杂质元素之一,现行大多数稀土产品的国家标准都对铁有控制要求。铁杂质元素不仅仅影响稀土产品的质量,同时也制约着稀土产品的应用范围。本方法确定了ICP-AES法测定离子型稀土矿混合稀土氧化物中三氧化二铁含量的最佳分析条件,提出以近似基体匹配的方式消除稀土基体效应的影响,方法检出限为0.0015%~0.0017%,测定范围为0.010%~1.80%,精密度在1.61%~3.40%,加标回收率在100.4%~104.0%,与分光光度法对比结果一致。该方法测定含量范围宽、操作简单、分析速度快、结果准确可靠,能满足离子型稀土矿混合稀土氧化物中三氧化二铁含量的分析要求。As one of the most important raw materials for the production of rare earth chloride and rare earth oxide,the quality of ion-absorption rare earth ore affects the extraction and separation effect of back-end rare earth and the quality of oxide.Iron is one of the most common impurity elements in ion-absorption rare earth ore,and most of the current national standards for rare earth products have control requirements for iron.Iron impurities not only affect the quality of rare earth products,but also restrict the application range of rare earth products.The optimum analytical conditions for determination of ferric trioxide in mixed rare earth oxide of ion-absorption rare earth ore by ICP-AES method were determined,and the effect of rare earth matrix effect was eliminated by approximate matrix matching.The detection limit of the method was 0.0015%~0.0017%,the measurement range was 0.010%~1.80%,the precision was 1.61%~3.40%,and the recovery was 100.4%~104.0%,which was consistent with the results of spectrophotometry.The method has a wide range of determination,simple operation,fast analysis speed,accurate and reliable results,and can meet the requirements of the analysis of ferric oxide in mixed rare earth oxide of ion-absorption rare earth ore.

关 键 词：离子型稀土矿 三氧化二铁 电感耦合等离子体发射光谱法 ICP-AES 

分 类 号：O657.31[理学—分析化学] P575[理学—化学]