高压密闭消解-ICP-AES法测定沉积型稀土矿中La、Ce、Pr、Nd、Y、Nb、Zr  

Determination of La,Ce,Pr,Nd,Y,Nb and Zr in Sedimentary Rare-earth Ore by ICP-AES with Sealed Digestion

作　　者：邵坤[1,2,3] 余滔 龚大兴[1,2,3] SHAO Kun;YU Tao;GONG Da-xing(Institute of Multipurpose Utilization of Mineral Resources,Chinese Academy of Geological Sciences,Chengdu 610041,China;Technology Innovation Center of Rare Earth Resources Development and Utilization,China Geological Survey,Chengdu 610041,China;Sichuan Rare Earth Technology Innovation Center,Chengdu 610041,China)

机构地区：[1]中国地质科学院矿产综合利用研究所,四川成都610041 [2]中国地质调查局稀土资源应用技术创新中心,四川成都610041 [3]四川省稀土技术创新中心,四川成都610041

出　　处：《稀土》2024年第1期87-94,共8页Chinese Rare Earths

基　　金：中国地质调查局项目(DD20189507,DD20211236);四川省科技计划项目(2023YFQ0062)。

摘　　要：采用对位聚苯作为高压密闭消解罐材料,在240℃条件下,用HNO_(3)-NH_(4)HF_(2)快速分解了沉积型稀土矿中La、Ce、Pr、Nd、Y、Nb和Zr,然后用H_(2)SO_(4)赶酸破坏消解液中的稀土氟化物,在5%HCl-5%酒石酸介质中,通过优选分析谱线和基体匹配校正干扰,建立了高压密闭消解-电感耦合等离子体原子发射光谱法测定沉积型稀土矿中La、Ce、Pr、Nd、Y、Nb和Zr。相比于传统的密闭溶样法,本方法的分解温度更高、周期更短、效率更高。采用其他分析方法对实际样品进行对比测试,结果基本一致。La,Ce,Pr,Nd,Y,Nb,and Zr were rapidly decomposed in a sealed digestion tank available for para polyphenylene by HNO_(3)-NH_4HF_(2) at 240℃in sedimentary rare earth ores.H_(2)SO_(4) was used to drive acid to destroy the rare earth fluoride in the digestion solution,in the medium of 5%HCl-5%tartaric acid,the interference was corrected by optimizing the analytical spectral line and matrix matching.A method for the determination of La,Ce,Pr,Nd,Y,Nb,and Zr in sedimentary rare earth ores by high-pressure closed digestion inductively coupled plasma atomic emission spectrometry was established.The method has a higher decomposition temperature,a shorter cycle,and higher efficiency than the traditional closed-vessel digestion method.The results were in agreement with other methods according to the actual sample test analysis.

关 键 词：电感耦合等离子体原子发射光谱法(ICP-AES) 密闭溶样 沉积型稀土矿 稀有元素 稀土元素 

分 类 号：O657.31[理学—分析化学]