钨-3,5二溴水杨基荧光酮-CTMAB-Tween80多元配合物的分光光度法研究  

Spectrophotometric Study on the Color Reaction of Multicomponent Complex of Tungsten-3,5-Dibromosalicyl Fluorone-CTMAB-Tween80

作　　者：王军[1] 吕文英[2] 李全民[1] 杨林[1] 

机构地区：[1]河南师范大学化学与环境科学学院 [2]广东工业大学环境科学与工程学院,广东广州510090

出　　处：《光谱学与光谱分析》2004年第8期995-998,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金 (2 9971 0 0 9)资助项目

摘　　要：在混合表面活性剂溴化十六烷基三甲铵 (CTMAB)和吐温 80 (Tween80 )存在下 ,研究了 3,5 二溴水杨基荧光酮 (DBSAF)与钨 (Ⅵ )显色反应的光度特性。在 0 6 0mol·L-1HCl介质中 ,钨 (Ⅵ )与DBSAF及表面活性剂形成胶束络合物 ,采用混合表面活性剂使增溶增敏作用更为显著 ,络合物表观摩尔吸光系数ε =2 6 4× 10 5L·mol-1·cm-1,λmax =5 2 7nm。用摩尔比法和连续变换法测得钨 (Ⅵ )与DBSAF所形成的络合物化学计量比为 1∶2。钨 (Ⅵ )含量在 0～ 4 0 0 μg·L-1范围服从比尔定律 。In the presence of mixed surfactant cetyl trimethyl ammonium bromide(CTMAB) and Tween80, the photometric analysis properties of color reaction of 3,5-dibronosalicyl fluorone (DBSAF) with tungsten(VI) were studied. The experimental result showed that tungsten(VI) reacted with DBSAF to form a micelle complex with a maximum absorption at 527 nm in a 0.60 mol(.)L(-1) hydrochloric acid medium. The mixed surfactant remarkably improved the sensitivity of the method and the dissolubility of the Complex. The apparent molar absorptivity of the complex is 2.64 X 10(5) L(.)mol(-1.)cm(-1) at 527 nm. Tungsten (VI) reacted with DBSAF to form a complex with a stoichiometric: ratio of 1:2, which was determined by mole ratio method and continual method of transformation, respectively. Beer's law was obeyed in the range of 0-400 mug tungsten (VI) per L. The proposed method has been applied to the determination of trace amount of tungsten in alloy steel samples.

关 键 词：钨配合物 3 5二溴水杨基荧光酮 吐温-80 混合表面活性剂 分光光度法 含量测定 

分 类 号：O614.613[理学—无机化学] O657.3[理学—化学]