稀土离子对钐-铕-噻酚甲酰三氟丙酮-三正辛基膦化氧己烷萃取体系纸上荧光的增敏作用及其应用

在Sm3 + 、Eu3 + 噻酚甲酰三氟丙酮 三正辛基膦化氧己烷萃取体系中Y3 + 、La3 + 、Gd3 + 、Tb3 + 、Dy3 + 、Lu3 + 等离子可增强Sm3 + 、Eu3 + 的纸上荧光 ,其中以Tb3 + 的增敏效应最强 ,灵敏度提高了 6倍。将滤纸适当处理后可使Sm3 + 、Eu3 + 的检出限分别达到 0 .15和 0 .0 0 7ng。本法用于混合稀土氧化物中 0 .xng级的Sm3 + 和0 0 0xng级Eu3 + 的同时测定 ,结果满意

Sensitization Effect of Rare Earth Ions on Fluorescence of Samarium and Europium with Thenoyltrifluoroacetone- Trioctylphosphine Oxide System Using Filter Paper as the Substrate and Its Application

Some rare earth ions such as Y 3+ , La 3+ , Gd 3+ , Tb 3+ , Dy 3+ , Lu 3+ could remarkably enhance the fluorescence intensity of samarium europium thenoyltrifluoacetone trioctylphoshine oxide in fluorimetry using filter paper as the substrate, especially the sensitization effect of Tb 3+ was the most. It was found the sensitivity was raised 6 times than that of non sensitization system (absence of Tb 3+ ). The detection limit of Sm 3+ and Eu 3+ was 0.15 and 0.007 ng respectively. The method has been successfully applied to the simultaneous determination of 0 x ng Sm 3+ and 0.00 x ng Eu 3+ in samples of rare earth oxide.