新试剂1-(2-羟基-5-硝基苯基)重氮氨基偶氮苯的合成及其与镉的显色反应  

Synthesis of a new reagent 2-hydroxy-5-nitrophenyl- diazoaminoazobenzene and its color reaction with cadmi- um

作　　者：郑云法[1] 杨明华[1] 沈素眉[1] 

机构地区：[1]丽水师范专科学校化学系,丽水323000

出　　处：《化学试剂》2003年第1期31-32,49,共3页Chemical Reagents

基　　金：丽水师范专科学校重点资助课题。

摘　　要：合成了新试剂1-(2-羟基-5-硝基苯基)重氮氨基偶氮苯(HNPDAAB),并研究了它与镉的显色反应。在Triton X-100存在下,pH8.5～10.0的Na2B4O7-NaOH缓冲溶液中,试剂与镉生成1:1型深红色配合物,其表观摩尔吸光系数达1.66×105L·mol-1·cm-1。Cd2+的含量在0～9μg/25ml,范围内符合比尔定律。A new triazene reagent 2-hydroxy-5-nitro-phenyldiazoaminoazobenzene (HNPDAAB)has been synthesized and the color reaction of HNPDAAB with cadmium ( Ⅱ ) has been studied. Results show that the red complex appears in pH8. 5-10. 0 buffer solution of Na2-B4O7-NaOH in the presence of TritonX -100. The molar absorptivity is 1. 66×105L · mol-1 · cm-1. Beer's low is obeyed in the concentration range of 0-9μg/25mL for cadmium.

关 键 词：1-(2-羟基-5-硝基苯基)重氮氨基偶氮苯 合成 镉 显色反应 分光光度法 分析 显色剂 

分 类 号：O614.242[理学—无机化学] O657.32[理学—化学]