摘要
报道了以微晶萘作吸附载体，固态萃取分离痕量稀土元素的新方法。在pH5.8～8．6和7．2～8．6时，Sc(3+)和Y(3+)，La(3+)，Eu(3+)，Yb(3+)，Lu(3+)与8-羟基喹啉（oxine）形成的金属螯合物，可被微晶萘固态选择萃取。对影响固态萃取的各种因素进行了考察与优化，发现加入适量的Co(2+)可有效地富集ng·ml(－1)级甚至更低浓度级的稀土元素。当富集倍数为50时，本法测定上述元素的检出限达0．04～0．32ng·ml(－1)，平均相对标准偏差为1．86％～3．78％。
A new method was proposed to preconcentrate and separate trace rare earth elements bysolid-liquid extraction with microcrystamne naphthalene. Sc and other rare earth elements canbe precipitated by oxine in the range of PH 4. 5 ~ 8. 6 and PH 7. 2 ~ 8. 6 respetively. The oxinate may be extracted by microcrystalline naphthalene quantitatively under certain conditions.The effects of various experimental Parameters are optimized.
出处
《中国稀土学报》
CAS
CSCD
北大核心
1999年第1期94-96,共3页
Journal of the Chinese Society of Rare Earths
关键词
钇
镧
铕
镱
镥
稀土
钪
固态萃取
萘
测定
Rare earths, Solid-liquid extraction, Microcrystalline naphthalene, Scandium
