一种基于形成杂多核配合物的荧光增敏效应的研究Ⅰ.锰(Ⅱ)-7-(8-羟基-3,6-二磺基萘偶氮)-8-羟基喹啉-5-磺酸-硼(Ⅲ)三元体系的荧光性质及其分析应用

本文报道了一种新发现的荧光增敏效应.在7-(8-羟基-3,6-二磺基萘偶氮)-8-羟基喹啉-5-磺酸-硼(Ⅲ)配位反应体系的非平衡状态下加入微量Mn^2+,体系荧光强度大为增加,三元体系特征荧光峰波长与原二元体系相同.研究表明,荧光增敏同Mn^2+参与形成杂多核配合物有关.据此建立了Mn^2+的高灵敏分析方法, Mn^2+线性范围0～2.9×10^-7mol.L^-1,检出下限3×10^-9mol·L^-1.方法选择性亦好,大多数共存离子的干扰都比较小.以此法测定合成样和粮食试样中的微量锰.结果满意.

Studies on a new effect of fluorescent sensitization based on the formation of heteropolynuclear complex.Ⅰ.fluorescent properties of the ternary system Mn(Ⅱ)-7-(8-hydroxy-3,6-disulfonaphthylazo)-8-hydroxyquinoline -5-sulfonic acid-b(Ⅲ)and their analyti

When Mn(II) is added into 7-(8-hydroxy-3,6-disulfonaphthylazo)-8-hydroxyquinoline-5-sulfonic acid-boron(III) fluorescence system at nonequil. condition, the fluorescence intensity is greatly increased. It is confirmed that the sensitivity enhancement effect is due to the formation of heteronuclear complex, B-Mn-reagent. A sensitive fluorescence method is hereby established for Mn determination The linear range and detection limit of the method are 0-2.9 x 10-7 and 3 x 10-9 mol Mn/L, resp. The method was applied to the determination of Mn in synthetic samples and foods.