1-(4-安替比林偶氮)-2-萘酚新试剂与铜(Ⅱ)的显色反应研究及其应用  

Spectrophotometric Study of the Colour Reaction of 1 - (4 - Antipyrinylazo) - 2 - naphthol with Copper and Its Application

作　　者：褚少凤[1] 田应朝[1] 刘松愈[1] 张天发[1] 

机构地区：[1]云南大学化学系,昆明650091

出　　处：《云南大学学报（自然科学版）》1998年第S3期441-442,444,共3页Journal of Yunnan University(Natural Sciences Edition)

摘　　要：研究了新试剂１－（４－安替比林偶氮－２－萘酚（ＡＡＮ）对铜的选择性的光度测定方法．在ＮａＡｃ－ＨＡｃ介质中，铜与ＡＡＮ形成络合比为１：１的红色络合物，最大吸收波长为５０５ ｎｍ，摩尔吸光系数为２．２２ ｘ１０４Ｌ．ｍｏｌ－１，ｃｍ－１，铜量在 ０～１．６μｇ／ｍｌ范围内符合比尔定律．已应用于粗铅及水样中铜的光度法测定、无需特别分离．方法简便、快速、准确．A highly seletive method for spectrophotometric determination of copper with a new reagent, 1 - (4 - antipyrinylazo) - 2 - naphthol is developed. In the NaAc - HAc buffer medium, copper forms a red complex with AAN in molar ratio of 1: 1 and its maximum absorption of is at 505 nm. The molar. absorptivity is 2. 22 x 104 L. mol-1.cm-1. Beer's law is obeyed over the range of 0 - 40 μg/25ml. The method has been applied to the spectrophotometric determination of trace copper in lead and water without special seperation. The proposed method is simple, rapid and accurate.

关 键 词：1-(4-安替比林偶氮)-2-萘酚 光度测定 铜 

分 类 号：O657.3[理学—分析化学]