吡嗪-2,3-羧酸-乙醇体系导数荧光法同时测定钐、铕、铽、镝  

SIMULTANEOUS DETERMINATION OF SAMARIUM, EUROPIUM, TERBIUM, DYSPROSIUM WITH DERIVATIVE FLUOROMETRIC ANALYSIS OF PYRAZINE-2, 3-CARBOXYLIC ACID, ETHANOL SYSTEM

作　　者：刘淑萍[1] 

机构地区：[1]河北理工学院化工系,河北唐山063009

出　　处：《河北冶金》2001年第5期22-24,共3页Hebei Metallurgy

摘　　要：研究了各种有机溶剂对Ｅｕ３＋，Ｔｂ３＋－吡嗪－２，３－羧酸荧光体系的增敏效应。结果发现：乙醇不仅能使Ｅｕ３＋，Ｔｂ３＋的特征荧光增敏．而且也使Ｓｍ３＋，Ｄｙ３＋的荧光增敏。在ＰＨ６．０，９９．６％乙醇浓度体系中，Ｅｕ３＋，Ｔｂ３＋的荧光强度分别提高４４和１６倍，实现了同时测定Ｓｍ３＋，Ｅｕ３＋，Ｔｂ３＋，Ｄｙ３＋四种离子本方法已成功地应用于混合稀土氧化物中四者含量的测定。The sensitivity-increasing effect of various organic solvents on Eu3+,Tb3+ - pyrazine-2, 3-carboxylic acid fluorescence system is studied. It is found from the result that ethanol can make not only representative fluorescence sensitivity of Eu3+ and Tb3+ increased but also that of sm3+ and Dy3+ increased. In ethanol system of pH6.0 and 99.6% of consistency the fluorescence strengths of Eu3+ and Tb3+ separately increase by 44 and 16 times, and four kinds of ion: Sm3+, Eu3+. Tb3+ and Dy3+ can be determined simultaneously This method has been successfully used in determination of contents of the four in mixed rare-earth oxide.

关 键 词：吡嗪 羧酸 乙醇 荧光法 钐 铕 铽 镝 测定 

分 类 号：O614.33[理学—无机化学] O657.39[理学—化学]