【摘要】 合成了新显色剂 1 - ( 2 -羟基 - 5 -硝基苯基 ) -重氮氨基偶氮苯 ( HNPDAAB) ,研究了该试剂与镍的显色反应条件。在 Triton X- 1 0 0存在下 ,镍与试剂生成 1∶ 1型深红色配合物 ,其表观摩尔吸光系数达 1 .5 8× 1 0 5L· mol- 1· cm- 1。 Ni2 + 的浓度在 0～9μg/2 5 m L范围内符合比耳定律。方法已应用于合金中微量镍的测定 ,结果满意更多还原

【Abstract】 A new reagent, 2 hydroxy 5 nitrophenyldiazoaminoazobenzene (HNPDAAB) has been synthesized, and the color reaction of nickel(Ⅱ) with this reagent was studied. In the presence of Triton X 100, Nickel(Ⅱ) reacts with HNPDAAB and forms a 1∶1 red complex. The molar absorptivity is 1.58×10 5 L·mol -1 ·cm -1 . Beer’s law is obeyed in the concentration range of 0～9 μg/25 mL for nickel. The analysis results of trace nickel in alloy samples using this method are in agreement with those determined by AAS.更多还原