3,4-DIHYDROXYBENZOIC ACID AS A REAGENT FOR THE SPECTROPHOTOMETRIC DETERMINATION OF TITANIUM

被引：8

作者：

FERREIRA, SLC

COSTA, ACS

ANDRADE, MGM

SANTOS, BF

LEITE, NO

机构：

[1] Universidade Federal da Bahia, Instituto de Química Salvador, Bahia

来源：

ANALYTICAL LETTERS | 1993年 / 26卷 / 05期

关键词：

3,4-DIHYDROXYBENZOIC ACID; SPECTROPHOTOMETRIC TITANIUM;

D O I：

10.1080/00032719308019881

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The reaction between titanium(IV) and 3,4-dihydroxybenzoic acid in agueous media results in an intensely colored complex which is stable for at least 8h. It allows the spectrophotometric determination of titanium in silicate rocks. The proposed method, in PH 4.0-6.0, shows a molar absorptivity of 1.43.10(4) L.mole-1.cm-1 at 380 nm. Beer's Law is obeyed up to 3.0 mug/mL of titanium(IV). The interference of iron(III) can be eliminated by reduction to iron(II) with hydroxylamine hydrochloride. The method was applied to the determination of titanium in various standard rocks and the results indicated that the accuracy and precision are satisfatory.

引用

页码：1001 / 1011

页数：11