6－羟基水杨酸－EDTA－溴化十六烷基三甲铵体系荧光法测定铽、镝、钐、钇、镥

FLUOROMETRIC DETERMINATION OF TERBIUM,DYSPROSIUM, SAMARIUM, YTTRIUM AND LUTETIUM WITH 6-HYDROXY-SALICYLIC ACID-EDTACETYLTRIMETHYL AMMONIUM BROMIDE SYSTEM

探讨了６－羟基水杨酸－ＥＤＴＡ－溴化十六烷基三甲铵体系对Ｔｂ３＋、Ｄｙ３＋、Ｓｍ３＋等金属离子激发态→金属离子基态跃迁型荧光增敏及Ｙ３＋、Ｌｕ３＋对该体系配体激发态一配体基态跃迁型荧光增敏效应。开发了同时测定Ｔｂ３＋、Ｄｙ３＋Ｓｍ３＋、Ｙ３＋（Ｌｕ３＋）的新荧光体系。利用该方法成功地测定了某些稀土氧化物中的铽、、镝、钐、钇、镥含量。

Based on the simultaneous determination of Tb3+ .Dy3 、Sm3+ by the metal ion excited state→ground state(m' →m)type fluorescence in 6-hydroxy-salicylic acid -EDTA cetyltrimethylammonium bromide system, the possibility Of determination of Y 3 +' Lu 3 + by the ligand excited state→ligand ground state (l' →l) type in the same system was studied.As a result,a method of utilizing the m' →m and l. →l tyPe fluorescence simultaneously to determin Tb3+ 、Dy3+、 Sm3+、Y3+(Lu3+ ) was edvelope. With this method, the contentS of terbium、dysprosum、samarium、ytt r in m and l u t etium in severral rare ear t h ox ides we re su ccessflly determined.