摘要
本文详细研究了稀土元素Ｌａ３＋、Ｇｄ３＋、Ｔｂ３＋、Ｌｕ３＋、Ｙ３＋及Ｓｃ３＋对铕苯甲酰二氟丙酮（ＢＴＡ）－阳离子表面活性剂体系的荧光增强效应。结果表明，在上述增强离子的分别存在下，体系的荧光强度分别增加１７、７５、６５、５、５５和１８倍，铕浓度在１．０×１０－１０－８．０×１０－７ｍｏｌ／Ｌ范围内与荧光强度成线性关系，最低检出限为１．０×１０－１１ｍｏｌ／Ｌ利用标准加入法测定了混合稀土氧化物中的铕，结果满意。
A fluorescence enhancement phenomenon shown by adding lanthanum,gadolinium, terbium, lutetium, yttrium or scandium ions to the europium-benzoyltrifluoroacetone (BTA) -cetyltrimethylammonium bromide (CTMAB) system was observed. In the presnce of the above enhancing ions,the fluorescence intensity of the system was in creased by a factor of 17, 75, 65, 50,55 or 18 compared to that when containing no enhancing ions, and it was a linear function of the concentration of europium in the range of 1. 0× 10-10 -8. 0 × 10-7 mol/L. The detection limit was 1. 0× 10-11 mol/L. The system was used for the spectrofluorimetric determination of europium in rare earth oxide with satisfactory results.
出处
《光谱学与光谱分析》
CSCD
北大核心
1995年第4期109-114,共6页
Spectroscopy and Spectral Analysis
关键词
荧光增强
铕
苯甲酰三氟丙酮
稀土
Fluorescence enhancement
Europium
Benzoyltrifluoroacetone
