5-碘[杯(4)芳烃偶氮]氨基喹啉光度法测定银  

Spectrophotometric determination of silver with 5-iodo-[calix(4)arene] aminoquinoline

作　　者：黄章杰[1] 胡秋芬[1] 王家强[1] 杨光宇[1] 

机构地区：[1]云南大学化学系,云南昆明650091

出　　处：《冶金分析》2004年第1期21-23,共3页Metallurgical Analysis

基　　金：云南省教委自然科学基金资助项目 (0 2ZY0 0 1)

摘　　要：合成了新试剂 5 碘 [杯 (4 )芳烃偶氮 ]氨基喹啉 (简称ICAQ ) ,并研究了该试剂与银显色反应条件。结果表明 ,在pH7 5的NaH2 PO4 -Na2 HPO4 缓冲介质中 ,在Tween 60存在下 ,试剂与银发生显色反应 ,生成 1:1稳定络合物。建立了测定银的光度法新体系 ,λmax=65 0nm ,ε =9 5 2× 10 4 ,在 2 5mL溶液中银的质量在 0～ 3 0 μg范围内符合比尔定律。方法用于显影液和工业废水中微量银的测定 ,结果令人满意。A color agent of 5-iodo-[calix(4)arene] aminoquinoline(ICAQ) was synthesized.The condition for color reaction of ICAQ with silver(I) was studied.In the presence of Tween-60,silver(I) reacts with ICAQ to form a stable complex with n_(ICAQ)∶n_(Ag(I))=1∶1 at pH7.5(NaH_2PO_4-Na_2HPO_4 buffer solution). Based on this,a spectrophotometric method for the determination of silver? was established. The maximum absorption is at 650nm with the apparent molar absorptivity of 9.52×10~4L·mol^(-1)·cm^(-1).Beer's law is obeyed in the rang of (0-30μg/25mL) for silver?. The method has been applied to the determination of silver in developing agent and the industrial waste water with satisfactory results.

关 键 词：偶氮类试剂 光度法 测定 银 ICAQ 显色反应 

分 类 号：TG115[金属学及工艺—物理冶金]