水杨醛缩邻氨基苯酚-锌荧光反应的研究  

Study on the fluorescence reaction of salicylaldehyde-o-aminophenol with Zn

作　　者：李永强[1] 刘晓霞[1] 王崇妍[1] 张远馥[1] 王金中[1] 

机构地区：[1]河南大学化学化工学院,河南开封475001

出　　处：《冶金分析》2007年第3期29-32,共4页Metallurgical Analysis

基　　金：河南省科技厅科技攻关资助项目(0424270116)

摘　　要：合成了荧光试剂水杨醛缩邻氨基苯酚(H2L)。在pH5·44六亚甲基四胺-盐酸缓冲溶液介质中,该试剂能与锌离子形成络合物使其荧光强度增强,且荧光增强的程度与锌离子含量线性相关,据此建立了直接测定痕量锌离子的荧光分析方法。研究了此试剂与锌荧光反应的最佳条件,在λex/em=405/517nm处,锌离子含量在0·7～158·0μg/L范围内与△F呈良好的线性关系,方法检出限为0·23μg/L。该方法操作简便快速,具有极高的灵敏度,可用于水样中痕量锌的测定。Fluorescence reagent salicylaldehyde-o-aminophenol was synthesized. In the buffer solution medium of urotropine and hydrochloric acid at pH 5.44, the reagent can form a stable complex compound with zinc. The complex compound made fluorescence intensity increase and the degree of increasing was linear with the content of zinc. Based on this,a new method for the direct determination of trace Zn（Ⅱ） was established. The optimum condition of fluor, escence reaction was studied. The effect of existence ion was discussed. The maximum excitation and emission wavelengths are found to be 405 nm and 517 nm, respectively. The linear range of determination is 0. 7-158.0 μg/L. The standard solution was determined for zinc of 100 μg/L （n=11）, RSD is 1.98%, and the detection limit is 0.23 μg/L. This method has been appplied to the determination of trace Zn（Ⅱ） in water with the recovery of 101%-102%.

关 键 词：荧光增强 锌离子 水杨醛缩邻氨基苯酚 

分 类 号：O657.3[理学—分析化学]