摘要
本文研究了新显色剂2-[2′-(6′-甲基-苯并噻唑)偶氮]-5-二甲氨基苯甲酸(MBTAMB)与铜(Ⅱ)的显色反应及MBTAMB的酸碱平衡。试验表明MBTAMB在乙醇介质中,铜(Ⅱ)与MBTAMB形成1:1络合物,其λ_(max)为660nm,表观摩尔吸光系数为7.0×10~4L·mol^(-1)·cm^(-1),铜(Ⅱ)浓度在0～18μg/25ml范围内符合比尔定律。本法操作简便,可直接应用于铝合金及电镀废液中微量铜的测定,结果满意。
The acid-base equilibrium of a new thiazolylazo reagent, 2-C2-(6-methyl-benzothiazolyl)azo]-5-dimethylaminobenzoic acid (MBTAMB),was studied,MBTAMB reacts with copper(Ⅱ) to form an 1 : 1 stable blue complex in an aqueous alcohol solution at pH 4. 5. The apparent molar absorptivity of the complex is 7. 0×104L· mol-1 · cm-1· Beer's law is obeyed in the range of 0-18 μg/25ml for copper. The method can be applied to the determination of copper in aluminium alloys and electroplating waste water with satisfactory results.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1993年第9期1088-1091,共4页
Chinese Journal of Analytical Chemistry
基金
浙江省自然科学基金
关键词
铜
MBTAMB
酸碱平衡
分光光度法
2-[2-(6-Metbyl-benzothiazolyl)azo]-5-dimethylaminobenzoic acid. Acid-base equilibrium
Copper
Spectrophotometry.
