摘要
介绍了新显色剂邻羧基苯基重氮氨基－４－苯基－２－噻唑（ＣＰＤＡＰＴ）的合成方法，并研究了在混合表面活性剂ＯＰ－ＳＤＳ存在下，与铂显色反应的适宜条件。结果表明，在ｐＨ６．４－７．０范围内，铂与ＣＰＤＡＰＴ形成１：２红色络合物，其最大吸收波长位于４９０ｎｍ，络合物的表现摩尔吸光系数，铂浓度在０－５．０ｕｇ／２５ｍｌ范围内遵守比尔定律。该试剂对铂的测定灵敏度高，操作简便。方法用于催化剂中微量铂的测定，结果满意。
This paper described the method of synthesis of o-carboxylphenyldiazoamino-4-phenyl-2-thiaole(CPDAPT)* and the colour reaction between the reagent and platinum has been studied.The results show that in the medium of pH6.4-7.0 and in the presence of OP-SDS platinum(Ⅱ) reacts with CPDAPT to form a red complex with the mo-*lar ratio of 1:2 The complex exhibits maximum absorption at 490nm with a molar absorptivity of 4.27 x105L. mol-1. cm-1.Beer's law is obeyed in the range of 0-5ug/25ml for Pt(Ⅱ).the method has been applied to the determination of micro platinum(Ⅱ)in Pt-C catalyst with satisfactory results.*
出处
《冶金分析》
CAS
CSCD
北大核心
1998年第3期27-29,共3页
Metallurgical Analysis
关键词
铂
分光光度法
显色反应
显色剂
CPDAPT
o-Carboxylphenyldiazoamino-4-pbenyl-2-thiazole
Platinum
Spectrophotometry
