NEW SPECTROPHOTOMETRIC METHOD FOR SULFITE DETERMINATION

被引：24

作者：

ABDELLATIF, MS

机构：

[1] Department of Chemistry, The Islamic University of Gaza, P.0. Box 108, Gaza

来源：

ANALYTICAL LETTERS | 1994年 / 27卷 / 13期

关键词：

SULFITE; O-PHTHALDIALDEHYDE; AMMONIA;

D O I：

10.1080/00032719408002664

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A highly selective spectrophotometric method for the determination of aqueous sulfite was developed. Sulfite was found to react with o-phthaldialdehyde in presence of ammonia yielding a deep blue colored complex the absorbance of which is sensitive to trace sulfite concentrations. The method is simple, very sensitive, and convenient for the determination of as little as 5X10(-6) M sulfite. The molar absorptivity of the colored complex is about 1.2X10(4) L cm(-1) mol(-1). The proposed method is more sensitive and selective for sulfite than the widely used Ellman reagent method. Absorbance is measured at 628 nm which is the best of the two absorption maxima that are exhibited by the compound.

引用

页码：2601 / 2614

页数：14

共 10 条

[1] FLUOROMETRIC-DETERMINATION OF UREA BY FLOW-INJECTION ANALYSIS [J].