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DAAB的合成及Cu(II)-DAAB-SDBS-Triton X-100新显色体系的研究
SYNTHESIS OF O,O′-DIAMINOAZOBENZENE AND STUDY ON THE NEW COLOUR-FORMING SYSTEM Cu(Ⅱ)-O,O′-DIAMINOAZOBENZENESODIUM DODECYLBENZENE SULFONATE-TRITON X-100
【摘要】 <正> 光度法测定铜的显色剂虽然很多,但是选择性好,能在水溶液中直接进行测定的试剂却很少。从铜(Ⅱ)的化学性质来考虑,邻,邻’-二氨基偶氮苯(简称DAAB)可能是光度法测定铜(Ⅱ)的良好显色剂。本文对DAAB的合成方法作了改进,用改进过的方法合成了DAAB;并对Cu(Ⅱ)-DAAB-SDBS-Triton X-100新显色体系作了系统的研究,得到了令人满意的结果。 1.试剂和仪器: DAAB(作者合成):0.04％乙醇溶液。铜标准溶液:将高纯金属铜溶于硝酸,加盐酸除尽硝酸。配成浓度为50μg/ml。
【Abstract】 An improvement on the svnthetic method of O, O′-diaminoazobenzene (DA.AB) is described. This method is simple and rapid. Yield is higher, and product stable and low-cost.The new colour-forming system Cu(Ⅱ)-DAABSDBS-Triton X-100 has been studied systematically. In the acetate buffer of pH 4to6, Cu(Ⅱ) forms a red quaternary complex with DAAB in the presence of SDBS and Triton X-100 showing absorption maximum at 530nm with a molar absorptivity 1.0X10~4l·mol·cm.Beer’s law is obeyed for copper of 0. 20-5. 6ppm. The system has good selectivity-It serves well for the spectrophotometric determination of copper.
- 【文献出处】 分析化学 ,Chinese Journal of Analytical Chemistry , 编辑部邮箱 ,1985年10期
- 【被引频次】1
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