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 Titanium-Bromopyrogallol Red

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％。

Abstract: 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 L