2-羟基-4-磺酰氨基苯-3-(4-硝基苯)-三氮烯的合成及与镉的显色反应  

Synthesis of 2-hydroxy-4-sulfamylbenzen-3-(4-ni trophenyl)-triazene and its colour reaction with cadmium

作　　者：郑云法[1] 张春牛[1] 顾勇冰[1] 

机构地区：[1]丽水学院化学系,浙江丽水323000

出　　处：《浙江师范大学学报（自然科学版）》2005年第2期183-186,共4页Journal of Zhejiang Normal University:Natural Sciences

基　　金：丽水学院重点课题(KZ04006)

摘　　要：合成了新的三氮烯试剂--2-羟基-4-磺酰氨基苯-3-(4-硝基苯)-三氮烯,并研究了其在Triton X-100表面活性剂存在下与镉的显色反应.在pH=11.0～12.0的Na2B4O7-NaOH缓冲溶液中,该试剂与镉形成3:1型浅黄色配合物,配合物的最大吸收峰位于λ=535 nm处,表观摩尔吸光系数为1.46×105L·mol-1·cm-1,ρ(Cd2+)在0～480μg/L时符合比尔定律.用拟定方法测定废水中的微量镉,结果满意.The 2-hydroxy-4-sulfamylbenzen -3-(4-ni tr ophenyl)-triazene(HSNPT) were synthesized. The color reaction of HSNPT with c admium was investigated. In the presence of the surfactant (Triton X-100) and medium phase of Na-2B-4O-7-NaOH(pH=11.0～12.0), HSNPT formed a yellow comple x with Cd(Ⅱ). The molar absorbtivity of the complex was ε=1.46×10+5 L· mol·cm+{-1} at {λ-{max} 535} nm.The molar ratio of Cd(Ⅱ) to HSNPT was 1∶3. The Beer′s law was well obeyed in the rang of {0~}480 μg /L for nickel at the determination wavelength. This method had been applied to determin e cadmium in waste water and the results were showed to be satisfied.

关 键 词：显色反应 硝基苯 氨基苯 合成 羟基 表观摩尔吸光系数 TRITON 三氮烯试剂 表面活性剂 缓冲溶液 比尔定律 配合物 微量镉 

分 类 号：TQ246.35[化学工程—有机化工] O614.121[理学—无机化学]