锆-槲皮素-8-羟基喹啉-5-磺酸-十二烷基磺酸钠体系的荧光光度法研究

Fluorimetry of Zirconium—Quercetin—8-Hydroxyquinoline 5-sulfonic Acid—Sodium Dodecyl Sulfonate System

在０．３６ｍｏｌ／ＬＨＣｌ介质中，有十二烷基磺酸钠（ＳＤＳ）存在下，Ｚｒ（Ⅵ）与槲皮素（Ｑｕ）和８－羟基喹啉－５－磺酸（Ｈ２ＱＳ）形成四元荧光络合物。其组成比为ｎＺｒ：ｎＱｕ：ｎＨ２ＱＳ：ｎＳＤＳ＝１：１：２：１。激发与发射波长λｅｘ＝４５０ｎｍ和λｅｍ＝５００ｎｍ时，体系荧光强度最大。线性范围为０～２４ｍｇＺｒ／Ｌ，检出限为５６μｇ／Ｌ。方法用于岩石中微量锆的测定，结果满意。

In medium of 0.36mol/L HCl and in the presence of sodium dodecyl sulfonate (SDS),zirconium(IV) forms a quaternary fluorescene complex with quercetin(Qu) and 8-hydroxyquinoline-5-sulfonic acid (H 2QS).The molar ratio of Zr to Qu,H 2QS and SDS is 1:1:2:1.The excitation and emission wavelengths are 450nm and 500nm with strong fluorescence,respectively.The linear range is 0-2.4mg/L for zirconium(IV).The detection limit of zirconium(IV) is 5.6μg/L The proposed method has been applied to determine zirconium(Ⅳ) in ores with satisfactory results.