混合胶束对钛-溴邻苯三酚红显色体系的增敏作用  

Sensitization of Mixed Micelle for\= TitaniumBromopyrogallol Red

作　　者：罗宗铭[1] 梁亮[1] 钟东华 彭进平 

机构地区：[1]广东工业大学化工系

出　　处：《岩矿测试》1999年第2期157-159,共3页Rock and Mineral Analysis

基　　金：广东省高教厅重点学科资助

摘　　要：在５．０×１０－３ｍｏｌ／ＬＨ２ＳＯ４介质中，溴化十六烷基吡啶（ＣＰＢ）和ＯＰ存在下，Ｔｉ（Ⅳ）与溴邻苯三酚红（ＢＰＲ）形成红紫色络合物。该络合物的λｍａｘ＝６３８ｎｍ，ε为５．８１×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，钛的质量浓度为０～０．３２ｍｇ／Ｌ时符合比尔定律。拟定的方法用于硅酸盐岩石中微量钛的测定，结果与原结果相符，ＲＳＤ（ｎ＝６）＜１．５０％。In 5.010-3 mol/L H2SO4 medium and in the presence of cetylpyridine bromide and OP, titanium () reacts with bromopyrogallol red to form a purpureal complex. The complex exhibits maximum absorption at 638 nm with the apparent molar absorptivity of 5.81104 Lmol-1cm-1. Beers law is obeyed in the range of 00.32 mg/L for Ti. The proposed method has been applied to the spectrophotometric determination of trace titanium in silicate rocks. The results are in good agreement with recommended values with precision of <1.5% RSD (n=6).\=\=

关 键 词：钛 溴铃苯三酚红 硅酸盐岩石 胶束增敏 显色体系 

分 类 号：O614.411[理学—无机化学]