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.
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收藏
页码：539 / 541
页数：3
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