锡(Ⅱ)增敏四环素体系导数荧光法测定铕及其增敏机理的探讨  

Enhancement Mechanism of the Fluorescence of Europium-Tetracycline System Enhanced by Sn Ion and Its Application to the Derivative Determination of Europium

作　　者：张俊杰[1] 李红霞[1] 黄汉国 

机构地区：[1]河北理工学院化工系,唐山063009

出　　处：《冶金分析》1999年第3期16-18,共3页Metallurgical Analysis

摘　　要：研究了锡（Ⅱ）对铕－四环素体系中铕的荧光增敏作用，对其增敏机理进行了探讨，并进一步研究了该体系荧光法测定铕的最佳测定条件。该体系测定铕的检测限为０．０２μｇ／Ｌ，无锡存在时，铕的检测限为０．０９μｇ／Ｌ。锡（Ⅱ）使铕的荧光检测限降低了４．５倍，用一级导数荧光法，使铕的荧光检测限进一步降低到０．０１μｇ／Ｌ。成功地测定了混合稀土氧化物中铕的含量．In this paper the influence of Sn ion on the fluorescence of europium-tetracycline system was studied, and the fluorescence enhancement mechanism was investigated. The optimum experimental conditions were also proposed. The detection limites for europium in this system are 0.02μg/L in the presence of Sn ion and 0.09μg/L in the absence ofSn ion. The detection limit can also be decreased to 0.01 1μg/L by using the first order derivative fluorophotometry.This system has been successfully used in the determination of europium in the rare earth oxides with satisfatory results.

关 键 词：铕 四环素 锡 导数荧光法 测定 增敏机理 

分 类 号：O614.338[理学—无机化学]