Synthesis of 1-(5-nitro-3-benzopseudothiazolyl)-3-(4-phenylazophenyl)-triazene and Its Color Reaction with Cobalt

被引：0

作者：

章汝平 ^{[1
]}

林丹丽 ^{[2
]}

机构：

[1] Department of Chemistry, Longyan College

[2] Research Center for Analysis and Measurement,Donghua University

来源：

Journal of Donghua University(English Edition) | 2007年 / 04期

关键词：

1-(5-nitro-3-benzopseudothiazolyl)-3-(4-phenylazophenyl)-triazene; color reaction; Cobalt;

D O I：

10.19884/j.1672-5220.2007.04.020

中图分类号：

O621.3 [有机合成化学];

学科分类号：

070303 ; 081704 ;

摘要：

A new chromogenic reagent, 1-(5-nitro-3-benzopsendothiazde)-3-(4-phenylazophenyl) -triazene (NBPTPAPT) has been synthesized and used as a sensitive reagent for the spectrophotometric determination of cobalt. In the presence of Tween-80,the reagent with Co (Ⅱ) forms a yellow complex (1∶2) in the buffer solution of Na2B4O7-NaOH at pH10.54. The apparent molar absorptivity is 1.22×105L·mol-1·cm-1 with the linear range of 0-240μg/ L for Co (Ⅱ) by dual-wavelength spectrophotometry. Trace cobalt in vitamin B12 and tea samples has been determined with satisfactory results.

引用

页码：539 / 541

页数：3

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