Catalytic spectrophotometry for the determination of trace cobalt by the new indicating reaction

被引：0

作者：

Qi, YJ ^{[1
]}

Wang, XJ ^{[1
]}

Li, HM ^{[1
]}

Gao, HW ^{[1
]}

机构：

[1] Changchun Normal Coll, Dept Chem, Changchun 130032, Peoples R China

来源：

SPECTROSCOPY AND SPECTRAL ANALYSIS | 2002年 / 22卷 / 03期

关键词：

cobalt; potassium periodate; malachite green; catalytic spectrophotometry;

D O I：

暂无

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

A kinetic spectrophotometric method for the determination of trace cobalt(II) wets established. It was based on the Co(II) catalyzing the discoloring reaction of malachite green by potassium periodate in the presence of HBO, Na2B4O7 olutioii (pH = 8,5). The sensitivity of the method is 2.1 x 10(-10) g . mL(-1). The range of determination is 0-0.8 mug . 25 mL(-1). The apparent activation of catalytic reaction is 37.94 kJ. mol(-1). The method has been applied to the determination of cobalt in tea leaf and injection of vitamin B-12 samples with satisfactory results.

引用

页码：449 / 450

页数：2