Spectrofluorimetric determination of terbium(Ⅲ) by fluorescence enhancement system of Tb-TPA-Triton X-100 by La^(3+)  

作　　者：ZHAO Guohu and ZHAO JunBasic Science Department, Gansu Agricultural University, Lanzhou 730070, China (Received 2002-04-29) 

出　　处：《Rare Metals》2003年第2期112-115,共4页稀有金属（英文版）

基　　金：This project is financially supported by the Gansu Province Natural Science Foundation (ZR-97-21)

摘　　要：The phenomenon of fluorescence enhancement for the system of terbium(b!) with terephthalic acid (benzene-1,4-dicarboxylic acid (TPA)) in the presence of an excess of La3+ in Triton X-100 aqueous solution has been studied. The fluorescence intensity of Tbb!-TPA system can be greatly increased by La3+. The intermolecular transfer of energy was responsible for the mechanism of the fluorescence enhancement. Triton X-100 plays an important role for the stabilization of the system. The system, having the maximum excitation and emission wavelengths at 256 nm and 546 nm, respectively, shows a constant fluorescence intensity over the pH range between 4-6. The fluorescence intensity is a linear function of Tb3+concentration in the range of 1.00 ?The phenomenon of fluorescence enhancement for the system of terbium(b!) with terephthalic acid (benzene-1,4-dicarboxylic acid (TPA)) in the presence of an excess of La3+ in Triton X-100 aqueous solution has been studied. The fluorescence intensity of Tbb!-TPA system can be greatly increased by La3+. The intermolecular transfer of energy was responsible for the mechanism of the fluorescence enhancement. Triton X-100 plays an important role for the stabilization of the system. The system, having the maximum excitation and emission wavelengths at 256 nm and 546 nm, respectively, shows a constant fluorescence intensity over the pH range between 4-6. The fluorescence intensity is a linear function of Tb3+concentration in the range of 1.00 ?

关 键 词：Analytical chemistry terbium determination spectrofluonmeter benzene-1 4-dicarboxylic acid triton X-100 

分 类 号：O657.3[理学—分析化学]