新显色剂间溴偶氮羧——m与铜的显色反应及其应用研究  

Study on a Colour Reaction Between Copper and Metabromocarboxyazo—m and Its Application in Determinations

作　　者：邓桂春[1] 考爱民 

机构地区：[1]辽宁大学化学系

出　　处：《辽宁大学学报（自然科学版）》1992年第3期23-26,共4页Journal of Liaoning University：Natural Sciences Edition

摘　　要：本文研究了铜(Ⅱ)与新显色剂间溴偶氮羧—m的显色反应,在5～20℃试剂与铜形成β型配合物,最大吸收波长为710nm,ε_(710)=1.11×10~5L·mol^(-1)·cm^(-1),显色酸度为pH2.80～3.20,铜含量在0～16μg/25mL服从比耳定律,颜色稳定,操作简便,测定铝合金中铜的结果令人满意。Metabromocarboxyazo—m, a new spectrophotometric reagent has been investigated for the determination of Cu(Ⅱ), Its colour reaction develops readily at roomtemperature 5～20℃. The coloured complex exhibits maximum absorption at 710nm. Its apparent molar absorptivity has been found to be 1.11×10~5L·mol^(-1).cm^(-1). Beer's law is followed in the range of 0～16 μg/25mL for Cu (Ⅱ). The method has the advantages of stability and simpticity.

关 键 词：分光光度法 铜 间溴偶氮羧-M 

分 类 号：O614.121[理学—无机化学]