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.
出处
《分析试验室》
CAS
CSCD
2000年第1期60-62,共3页
Chinese Journal of Analysis Laboratory
关键词
分光光度法
8-羟基喹啉
合金钢
显色反应
Spectrophotometry
nickel
7 (4,5 dimethyl 2 thiazolylazo) 8 quinolinol
alloy steel
