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).\=\=
出处
《岩矿测试》
CAS
CSCD
北大核心
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
关键词
钛
溴铃苯三酚红
硅酸盐岩石
胶束增敏
显色体系
titanium
bromopyrogallol red
silicate rock
spectrophotometry
sensitization of micelle\=\=\=
