2,3,7-三羟基-9-[4-(2,5-二羟基)苯偶氮]苯基荧光酮的合成及胶束增敏测定钨(Ⅵ)的研究  

STUDIED ON SYNTHESES OF 2,3,7 TRIHYDROXY 9 [4 (2,5 DIHYDROXY)PHENYLAZO]PHENYLFLUORONE AND DETERMINATION OF TUNGSTEN(Ⅵ)FOR CHROMOGENIC ENHANCEMENT OF MICELLE

作　　者：袁丁[1] 黄应平[1] 

机构地区：[1]湖北三峡学院化学系,湖北宜昌443000

出　　处：《商丘师范学院学报》1999年第6期75-78,共4页Journal of Shangqiu Normal University

基　　金：湖北省教委重点科研资助项目

摘　　要：报道了以对氨基苯甲醛、对苯二酚为主要原料，新显色剂２ ，３ ，７三羟基９［４（２ ，５二羟基） 苯偶氮］ 苯基荧光酮（ＡＰＰＦ） 的合成方法，元素分析、红外光谱等方法鉴定了试剂的结构．在混合表面活性剂ＣＴＭＡＢ和Ｔｗｅｅｎ８０ 存在下，研究了试剂与钨（ Ⅵ） 的显色反应光度特性并讨论了胶束增敏的机理．在０２ ｍｏｌ／ＬＨＣｌ 介质中，试剂与钨（ Ⅵ） 及表面活性剂形成胶束络合物，最大吸收波长位于５３５ ｎｍ 处，混合表面活性剂有一定的增敏作用，络合物表观摩尔吸光系数为１３２ ×１０５ Ｌ·ｍｏｌ－ １·ｃｍ － １ ．钨含量在０ ～０３２ μｇ／ｍｌ 范围服从比尔定律．拟定分析方法用于钢样中微量钨的测定。In this paper,the now reagent of 2,3,7 trihydroxy 9 [4 (2,5 dihydroxy)phenylazo]phenylfluorone(APPF) was synthesized using p Aminobenzaldehyde and hydoquinone as mainly material and the structure of reagent was characterized by elemental analysis,infrared spectra.In the presence of mixed surfactant CTMAB and Tween80,the photometric analysis properties of color reaction of APPF with W(Ⅵ)were studied and the mechanism of Chromogenic enhancement in the mixed surfactant CTMAB and Tween80 was discussed.In 0.2mol/L hydrochloric acid medium,W(Ⅵ) reacted with APPF to form a complex with maximum absorption at 535nm and an apparent molar absorptivity of ε=1.32×10 5L·mol -1 ·cm -1 .It indicated the effect of Chromogenic enhancement for color reaction was greatly produced by mixed micelle.Beer's law was obeyed in the range of 0-0.32μg W(Ⅵ) per mL.The method has been applied satisfactorily to the determination of Tungsten in alloys steel samples.

关 键 词：2 3 7三羟基9[4(2 5二羟基)苯偶氮]苯基荧光酮 钨 溴化十六烷基三甲胺 Tween80 分光光度法 

分 类 号：O657.32[理学—分析化学]