摘要
异烷基膦酸1-甲庚基酯(代号5712)是在较低酸度下具有优良稀土分离性能的萃取剂。本文测定了15种稀土(Ⅲ)在5712-负载树脂与不同浓度的HNO_3之间的分配比。研究了5712-负载树脂柱分离Y、Tb、Dy、Ho、Er的最优条件。0.58mol/L HNO_3可使这5种元素分离良好。利用5712-负载树脂分离和富集高纯氧化钇中痕量Eu、Tb、Er和Yb,然后再以原子吸收光谱法测定。经过本法分离和富集,除去了大量基体,从而提高了测定的灵敏度。
1-Methylheptyl iso-alkylphosphonate (designated as 5712) is one of the best extractants for the separation of rare earths (REs)from one another. This paper reports the distribution ratio of 15 REs (Ⅲ) between 5712-loaded resin (LR) and various concentrations of nitric acid. The optimum conditions for the separation of Y, Tb, Dy, Ho and Er with 5712-LR were investigated. Good separations of these five REs are achieved with 0. 58mol/L nitric acid as eluent. It is feasible to enrich traces of Eu,Tb,Er and Ybin high-purity yttrium oxide with 5712-LR. The removal of large amounts of matrix favors the determination of the traces with AAS.
出处
《分析试验室》
CAS
CSCD
北大核心
1993年第1期39-42,共4页
Chinese Journal of Analysis Laboratory
基金
国家自然科学基金资助
关键词
异烷基膦酸1-甲庚基酯
稀土元素
负载树脂
痕量富集
1-methylheptyl iso-alkylphosphonate
rare earths determination
extractant loaded resin
trace element enrichment
AAS