一种新的L~*-L型荧光增敏体系La^(3+)-水杨酸苯酯-TOPO-TX-100的研究和应用  

Study and application of a new L~*-L type fluorescence enhancement system of lanthanum-phenyl salicylate-trioctyl phosphine oxide -triton X-100

作　　者：王若曦[1] 刘成卜[1] 朱贵云[1] 

机构地区：[1]山东大学化学与化工学院

出　　处：《山东大学学报（理学版）》2005年第2期92-95,100,共5页Journal of Shandong University(Natural Science)

基　　金：国家自然科学基金资助重大项目 (2 0 13 3 0 2 0 )

摘　　要：研究发现镧与水杨酸苯酯发生荧光反应,形成荧光络合物,发射中心离子微扰的配体的L L型荧光.加入协同配体三辛基氧磷(TOPO)形成三元配合物,体系的荧光强度剧增5 9倍.这是一个新的L L型荧光增敏体系.实验表明在pH =8.6的缓冲溶液中,镧的浓度在1.0～70 .0 μmol L范围内与体系的荧光强度呈线性关系,当信噪比为3时,镧的检测限为0 .0 3μmol L .采用标准加入法测定了合成稀土样品中镧的含量,结果满意.Fluorescence enhancement of lanthanum-perturbated phenyl salicylate ligand was studied. The fluorescence intensity of binary system is increased fifty-nine times by the addition of TOPO-triton X-100. This is a new L*-L type fluorescence enhancement system. Under the optimum conditions, the fluorescence intensity of ternary complex system is a linear function of La 3+ concentration in the range of 1.0～70.0?μmol/L. The detection limit (signal-to-noise ratio=3) is 0.03?μmol/L. The system was used to determine the trace amounts of La 3+ of the synthetic rare earth oxide samples by a standard addition method.

关 键 词：镧 水杨酸苯酯 三辛基氧磷(TOPO) L^＊-L型荧光 荧光增敏 

分 类 号：O656[理学—分析化学]