摘要
介绍了新显色剂2-磺酸基苯基-1，4-二氨基重氮偶氮苯的合成及其与镍（Ⅱ）的显色反应。实验表明，在非离子表面活性剂TritonX-100的存在下，在pH10．5的硼砂一氢氧化钠缓冲介质中，镍（Ⅱ）与SDADA形成量比=1：3的红色络合物，在545nm处有一最大吸收峰，在433nm处有一最大负吸收峰。镍（Ⅱ）质量浓度在0．12～0．28μg／mL的范围内符合比耳定律，表观摩尔吸光系数为9．60×10^5L·mol／cm。
A new chromogenic reagent 2 - sulfobenzene - 1,4 - diamino diazoazobenzene was synthesized and its colour reaction with nickel （Ⅱ） was studied. The reagent was reacted with nickel （Ⅱ） to form a red complex in the medium of borax - sodium hydroxide buffer solution （ pHI0.5 ） with the existence of nonionic surfactant Triton X - 100. The molar ratio of the complex was 3 ： 1, with the maximum absorption at 545 nm and the miximum negative absorption at 433 nm. Beer＇s law was obeyed in the range of 0.12 - 0.28 mg of nickel in 25 ml solution, with the apparent molar absorptivity of 9.60 × 105 L × mol/cm.
出处
《云南化工》
CAS
2007年第6期39-41,共3页
Yunnan Chemical Technology
