氧瓶法测定含硼的有机稀土化合物中的稀土

氧瓶法测定含硼的有机稀土化合物中的稀土 DETERMINATION OF LANTHANIDES IN B-CONTAINING ORGANOLANTHANIDE COMPOUNDS BY O-FLASK COMBUSTION 谢正秋 first-author 段九菊 王光蕙 < 正 > 有机稀土化合物中稀土元素的测定,文献很少报导。Bazalitskaya,V.S.等人在测定有机稀土化合物中的碳氢时,报导了用称量燃烧残渣——金属氧化物,从而求出Er、Yb和Sm含量的方法[1]。但此方法测定一次样品不少于80分钟,对金属含量测定的绝对误差为±0.7%,此值大大超过了常规分析所允许的误差限度。再之,对有多种价态的稀土氧化物(如Pr 0 O 11 和Tb 4 O 7 )则不能用此法测定其金属含量。本文介绍有机硼化合物中La、Pr、Nd、Sm、Eu、Gd、Ho、Er、Tm、Yb等十种稀土元素的简便测定法——氧瓶分解测定法。 The percentage of rare earth element in B-containing organolanthanide compounds can be found by O-flask combustion decomposition and complexome-tric titration. After the sample is burnt in O-flask, RE 2 O 3 is formed on plati-num net, and then is absorbed by 2 NHC1 and transformed into L n 3+ simultaneo-usly on shaking. Finally the L n 3+ is titrated with EDTA in pH5—6 and in the existence of xylenol orange. Na 2 SO 4 is used as combustion additive to prevent the formation of B 4 C. 1984-02-01 2021-04-01 2