SPECTROPHOTOMETRIC DETERMINATION OF TRACE IRON AFTER COLLECTION AND ELUTION AS ITS 8-HYDROXYQUINOLINE-5-SULFONATE CHELATE ON PROTONATED CHITIN

被引：12

作者：

HOSHI, S ^{[1
]}

TOMIZUKA, T ^{[1
]}

ENJO, C ^{[1
]}

HAGA, Y ^{[1
]}

UTO, M ^{[1
]}

AKATSUKA, K ^{[1
]}

机构：

[1] KITAMI INST TECHNOL,DEPT FUNCT MAT,KITAMI,HOKKAIDO 090,JAPAN

来源：

ANALYTICAL SCIENCES | 1995年 / 11卷 / 05期

关键词：

PRECONCENTRATION; SPECTROPHOTOMETRIC DETERMINATION; IRON; IRON(III)-5-HYDROXYQUINOLINE-5-SULFONATE CHELATE; PROTONATED CHITIN;

D O I：

10.2116/analsci.11.729

中图分类号：

O65 [分析化学];

学科分类号：

070302 [分析化学]; 081704 [应用化学];

摘要：

A collection and elution method for anionic metal chelate on protonated chitin has been applied to the spectrophotometric determination of iron. Iron is collected as its anionic 8-hydroxyquinoline-5-sulfonate (8-HQ-5-S) chelate on a column of chitin in weak acidic medium. The iron(III)-8-HQ-5-S chelate collected on the chitin is effectively eluted with a small volume of 0.1 mol dm(-3) ammonia buffer solution (pH 9), and the absorbance of the eluent is measured at 571 nm. Beer's law is obeyed over the concentration range of 0.5 to 5 mu g of iron in 1 cm(3) of the eluent. Some metal ions and common inorganic anions do not interfere in concentration range of 100 to 1000 times that of iron, but the tolerance limit for Co, Ni and Cu is low due to the competitive reaction with 8-HQ-5-S. The present method can be applied to the determination of iron in tap and spring water samples.

引用

页码：729 / 732

页数：4

共 10 条

[1]

PRECONCENTRATION OF TRACE-METALS WITH DITHIOCARBAMATE-CHITIN [J].