新试剂3,5-二溴-4-偶氮变色酸苯基荧光酮与锆(Ⅳ)显色反应的研究及应用

Colour Reaction of a new Reagent DBACPF with Zirconium and Its Analytical Application

研究了在表面活性剂ＣＴＭＡＢ存在下，新试剂３，５－二溴－４－偶氮变色酸苯基荧光酮与锆（Ⅳ）显色反应条件和光度性质。在０．５ｍｏｌ／Ｌ盐酸介质中，形成红色胶束配合物，最大吸收波长为５３９ｎｍ，表观摩尔吸光系数为１．７４×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，锆含量在每２５ｍＬ０～１０μｇ范围内服从比尔定律。拟定方法用于直接测定铝合金中微量锆，结果满意。

In the presence of CTMAB,The colour reaction of a new colouring reagent 2,3,7 trihydroxy 9 [3,5 dibromo 4 (1,8 dihydroxy 3,6 disulfonic acid) naphthalene azo] phenylfluorone(DBACPF) with Zr(Ⅳ) has been studied,in 0.5mol/L hydrochloric acid medium,Zr(Ⅳ) reacts with DBACPF to form a red ternary micellar complex with maximum absorption at 539nm and a molar absorptivity of 1.74×10 5L·mol -1 ·cm -1 .Beer's law is obeyed for 1～10μg Zr(Ⅳ)per 25mL.The method has been used to deterine Zr(Ⅳ) in aluminum alloys with satisfactory results