新显色剂2,6-二氯-4-氨磺酰基苯基重氮氨基偶氮苯的合成及其与镍(Ⅱ)的高灵敏显色反应  

Synthesis of a new chromogenic reagent——2,6-Dichloro-4-sulfamoylbenzenediazoaminoazobenzene and its highly sensitive colour reaction with Ni(Ⅱ)

作　　者：孙培培[1] 王磊[1] 陈兰化[1] 

机构地区：[1]淮北煤炭师范学院化学系,淮北235000

出　　处：《化学试剂》1992年第5期307-309,282,共4页Chemical Reagents

摘　　要：新显色剂2,6-二氯-4-氨磺酰基苯基重氮氨基偶氮苯的合成及其与镍(Ⅱ)的显色反应。在非离子型表面活性剂 Triton X-100的存在下,于 pH 10.3的硼砂-氢氧化钠缓冲介质中,试剂与镍(Ⅱ)生成稳定的红色配合物。其最大吸收波长位于540nm 处,摩尔吸光系数为2.05×10~5L·mol^(-1)·cm^(-1)。在0～6μg/25mL 镍范围内符合比尔定律。测定了铝合金中镍的含量,结果满意。The synthesisof 2,6-dichloro-4-sulfamoylben-zenediazoaminoazobenzene and its properties aredescribed.In the presence of Triton X-100,at pH10.1～10.6,a stable red complex of Ni(Ⅱ)withthe reagent is formed.Its molar absorptivity is2.05×10~5 L.mol^(-1)·cm^(-1)at 540nm.Beer's law isobeyed in the range of 0～6μg Ni(Ⅱ)in 25mL ofsolution.Combined with n-butanol-dimethyl glyo-xime extraction this method was applied to thedetermination of Ni in aluminium alloy with sa-tisfactory results.

关 键 词：DCSDAA 镍 显色剂 显色反应 

分 类 号：O614.813[理学—无机化学]