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