SPECTROPHOTOMETRIC DETERMINATION OF COBALT IN AQUEOUS-SOLUTION USING DI-2-PYRIDYL KETONE DERIVATIVES

被引：19

作者：

ALNURI, MA ^{[1
]}

ABUEID, M ^{[1
]}

ZATAR, NA ^{[1
]}

KHALAF, S ^{[1
]}

HANNOUN, M ^{[1
]}

KHAMIS, M ^{[1
]}

机构：

[1] COLL SCI & TECHNOL,ABU DIS,ISRAEL

来源：

ANALYTICA CHIMICA ACTA | 1992年 / 259卷 / 01期

关键词：

SPECTROPHOTOMETRY; ALLOYS; COBALT;

D O I：

10.1016/0003-2670(92)85091-J

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A method for the spectrophotometric determination of cobalt(II) is presented, with a comparison of the binary complexes formed by cobalt(II) with di-2-pyridyl ketone nicotinoylhydrazone (DPKNH), di-2-pyridyl ketone 2-thiophenoylhydrazone (DPKTH) and di-2-pyridyl ketone benzoylhydrazone (DPKBH) in 50% (v/v) ethanolic solution. Cobalt(II) forms 1:2 complexes with the three reagents. Maximum absorbance is at 372 nm for Co(II)-DPKNH, at 389 nm for Co(II)-DPKTH and at 370 nm for Co(II)-DPKBH. Ranges of linearity, effects of pH and excess reagent, sensitivity, stability of the complexes and tolerance limits of ions are reported. It was concluded that the system with DPKTH is the best, followed by DPKNH and then DPKBH. The method was applied to the determination of cobalt in different alloys.

引用

页码：175 / 179

页数：5

共 17 条

[1] SPECTROPHOTOMETRIC DETERMINATION OF IRON WITH 2,2'-DIPYRIDYL-2-PYRIDYLHYDRAZONE [J].