2-吡啶重氮氨基偶氮苯的合成及其与铜的显色反应研究  

The synthesis of 2 pyridinediazoaminoazobenzene and study on its colour reaction copper(Ⅱ)

作　　者：汪朝存[1] 袁金伦[1] 

机构地区：[1]中国科学院广州化学研究所,广州510650

出　　处：《化学试剂》1999年第5期296-298,314,共4页Chemical Reagents

摘　　要：报道了一种新型的三氮烯类偶氮试剂的合成方法及其与铜（Ⅱ）的显色反应。在Ｔｒｉｔｏｎ Ｘ－１００ 存在下的ｐＨ１１．０ 的碱性介质中，该试剂与铜（Ⅱ）形成４∶１ 的红色配合物，最大吸收波长位于５２０ｎｍ 处，表观摩尔吸光系数为１．６０×１０５Ｌ·ｍ ｏｌ－ １·ｃｍ － １。含铜量在０～０．５ｍ ｇ／Ｌ范围遵守比耳定律。本方法应用于废水和铝合金中微量铜的测定。The synthesis of a new reagent 2 pyridinediazoaminoazobenzene and its chromogenic reaction with copper(Ⅱ) ion are reported. In an alkaline medium,the reagent reacts with copper(Ⅱ) to form a red complex with a composition ratio of 4∶1. The maximum absorption of the complex is at 520nm and the apparent molar absorptivity is 1.60×10 5 L·mol -1 ·cm -1 . Beer′s law is obeyed for copper(Ⅱ) in the range of 0～0.5 mg/L. This method has been employed to determine trace amounts of copper in waste water and aluminium alloy with satisfactory results.

关 键 词：吡啶重氮氨基 偶氮苯 铜 测定 

分 类 号：TQ421.383[化学工程] O614.121[理学—无机化学]