Fluorescence study of the interaction between a modified β-cyclodextrin and metacycline-EU3+ and its analytical application

被引：7

作者：

Jiang, CQ ^{[1
]}

Hou, FJ ^{[1
]}

机构：

[1] Shandong Normal Univ, Dept Chem, Jinan 250014, Peoples R China

来源：

ANALYTICAL LETTERS | 2004年 / 37卷 / 09期

基金：

中国国家自然科学基金;

关键词：

fluorescence; ethyl substituted beta-cyclodextrin; europium (EU3+); metacycline (MC); inclusion complex;

D O I：

10.1081/AL-120039433

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A simple sensitive spectrofluorimetric method was developed for the determination of metacycline. Ethyl substituted beta-cyclodextrin (DE-beta-CD) can remarkably enhance the fluorescence intensity of the metacycline (MC)-Eu3+ complex at lambda = 612 nm and the enhanced fluorescence intensity of Eu3+ ion is in proportion to the concentration of MC. Optimum conditions for the determination of MC were also investigated. The linear range and the detection limit of this method for the determination of MC are 2.20 x 10(-7) - 1.47 x 10(-5) mol/L and 3.60 x 10(-8) mol/L, respectively. The recommended method is practical and relatively free interference from coexisting substances and can be successfully applied to determination of MC in samples of serum and urine. The interaction mechanism between the complex MC-Eu3+ and DE-beta-CD has been studied. The enhancement of the fluorescence at lambda(em) = 612 urn of Eu3+ ion is because of the inclusion complex MC-Eu3+-DE-beta-CD.

引用

页码：1885 / 1895

页数：11

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