4,4′-二偶氮苯重氮氨基偶氮苯与Ag(Ⅰ)的显色反应及其应用  

The Color Reaction of 4,4′ -Biazobenzenediazoaminoazobenzene with Silver(Ⅰ) and Its Application

作　　者：周能[1] 赵书林[2] 刘典梅[2] 

机构地区：[1]玉林师范学院化学系,广西玉林市537000 [2]广西师范大学化学化工系,广西桂林市三里店541004

出　　处：《光谱实验室》2003年第2期205-208,共4页Chinese Journal of Spectroscopy Laboratory

摘　　要：本文报道了 4 ,4′ -二偶氮苯重氮氨基偶氮苯在 Triton X- 10 0存在下与 Ag( )的显色反应。在 p H10 .0的硼砂 -氢氧化钠缓冲溶液中 ,试剂与 Ag( )形成 1∶ 1的红色配合物 ,其最大吸收波长为 5 4 0 nm,表观摩尔吸光系数为 7.5 5× 10 4 L·mol-1·cm-1,Ag( )的浓度在 0— 0 .2 8mg/L范围内符合比耳定律。应用于显影废液和钮扣电池液中 Ag的测定 ,结果令人满意。The color reaction of 4,4′ -biazobenzenediazoaminoazobenzene with silver was studied.In weak alkaline medium and in the presence of triton X-100,silver reacts with 4,4′ -biazobenzenediazoamino-azobenzene to form a red 1∶1 complex.The maximum absorption of the complex is at 540nm,and the apparent molar absorptivity is 7.55×104L·mol -1·cm -1.Beers law is obeyed for silver in the range of 0-0.28mg/L .This method has been employed to determine the trace amounts of silver in developer waste solution and button cell solution with satisfactory results.

关 键 词：显色反应 4 4′-二偶氮苯重氮氨基偶氮苯 银 分光光度法 分析 显影废液 钮扣电池液 

分 类 号：O614.122[理学—无机化学] O657.32[理学—化学]