7-(4,5-二甲基-2-噻唑偶氮)-8-羟基喹啉与镍显色反应的研究和应用  

Study on the Colour Reaction of Nickel with 7-(4,5-Dimethyl-2-Thiazolylazo)-8-Quinolinol and its Applications

作　　者：涂志勇[1] 

机构地区：[1]芜湖教育学院化学系,芜湖241000

出　　处：《分析试验室》2000年第1期60-62,共3页Chinese Journal of Analysis Laboratory

摘　　要：探讨了题示试剂（ＤＭＴＡＱ） 与镍离子的显色反应条件，当ｐＨ ５．５ 时，在ＯＰ存在下，ＤＭＴＡＱ 与镍离子形成红色配合物，最大吸收峰位于５５６ ｎｍ ，表观摩尔吸收系数为１．２×１０５ Ｌ·ｍ ｏｌ－ １·ｃｍ － １。镍量在０～１２ μｇ／２５ ｍ Ｌ范围内符合比耳定律。已用于合金钢中镍的测定。The optimum conditions for the colour reaction of nickel with the reagent 7 (4,5 dimethyl 2 thiazolylazo) 8 quinolinol (DMTAQ) was studied.A red colour complex was formed from Ni(Ⅱ) and DMTAQ in the presence of OP at pH5.5.The complex has an absorption maximum at 556nm.The molar absorptivity is 1.2×10 5 L·mol -1 ·cm -1 ,Beer's law is obeyed for 0～12μg/25 mL of nickel.This method has been used for the determination of nickel in alloy steels with satisfactory results.

关 键 词：分光光度法 8-羟基喹啉 合金钢 显色反应 

分 类 号：TG115.335[金属学及工艺—物理冶金] O614.813[金属学及工艺—金属学]