【摘要】 在OP -40表面活性剂存在下 ,研究了 4,4!@ -二偶氮苯重氮氨基苯 (BABAB)与镍的显色反应。在 pH =9.0 -1 0 .5的Na2 B4 O7-NaOH缓冲溶液中 ,该试剂与镍生成 2∶1型深红色配合物。配合物的最大吸收峰位于λ =5 40nm处 ,表观摩尔吸光系数达 1 .5 9× 1 0 5L·mol- 1·cm- 1。Ni2 +的浓度在 0～ 1 0 μg/2 5mL范围内符合比耳定律更多还原

【Abstract】 The color reaction of 4,4’-biazobenzenediazoaminbenzene with nickel was investigated. In the presence of the surface active agent OP-40 and pH=9.3～10.0 using Na 2B 4O 7-NaOH as the amortizing system, BABAB with Ni(Ⅱ) forms a red complex. The molar absorbtivity of the complex is ε=1.59×10 5L·mol -1 ·cm -1 at the determination wavelength of 540 nm with the molar ratio of Ni(Ⅱ)to BABAB is 1 ∶2. The Beer’s law is well obeyed in the rang of 0-10μgNi/25ml at the determination wavelength.更多还原