新显色剂5-(4-氨磺酰基苯基偶氮)-8-氨基喹啉的合成及其与钴的显色反应研究  

SYNTHESIS OF 5-(4-SULFANOYLPHENYLAZO)-8-AMINOQUINOLINE AND ITS COLOR REACTION WITH COBALT(Ⅱ)

作　　者：徐继明[1] 吴斌才[2] 

机构地区：[1]淮阴师范学院化学系,准阴 223001 [2]华东师范大学化学系

出　　处：《理化检验（化学分册）》2000年第12期543-544,546,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：合成了 5- (4-氨磺酰基苯基偶氮 ) - 8-氨基喹啉 ,并对其与钴的显色反应作了探讨。试验表明 ,在阳离子表面活性剂 CTMAB存在下 ,于 p H 9.8的缓冲溶液中 ,试剂与钴形成紫红色配合物 ,其最大吸收波长位于 60 6nm,摩尔吸光系数为 7.0 8× 1 0 4 L· mol-1·cm-1,钴量在 0～ 1 5μg/2 5ml范围内符合比耳定律 ,方法用于标样和 VB12 中痕量钴的测定 。The new reagent 5 (4 sulfanoylphenylazo) 8 aminoquinoline was synthesized and its color reaction with cobalt(Ⅱ) was studied. As shown by the experimental results the reagent reacts with cobalt(Ⅱ) to form a 2∶1 violet red complex in the presence of CTMAB at pH 9.8. The absorption maxima lies at 606nm and the molar absorptivity is found to be 7.08×10 4L·mol -1 ·cm -1 . Beer′s law is obeyed in the range of 0~15μg/25ml. The method has been used in the determination of Co(Ⅱ) in VB 12 with satisfactory results.

关 键 词：8-氨基喹啉 合成 显色反应 钴 光度法 测定 

分 类 号：O614.812[理学—无机化学] O626.323[理学—化学]