双噻唑偶氮试剂BDTADAB与钯显色反应的研究和应用  

The Study on the Colour Reaction of Palladium with BDTADAB and Its Application

作　　者：吕伯升[1,2] 吴一梅 张孙玮[1,2] 

机构地区：[1]浙江工业大学轻工系 [2]杭州大学化学系

出　　处：《分析科学学报》1998年第3期204-207,共4页Journal of Analytical Science

摘　　要：研究了新的双噻唑偶氮试剂２，６－二偶氮［４，４＇－（双间苯二胺）］－苯骈［１，２－ｄ：４，５－ｄ＇］二噻唑（ＢＤＴＡＤＡＢ）与钯的显色反应．在５．８ｍｏｌ／Ｌ硫酸介质中，钯与试剂生成的络合物最大吸收波长为６０４ｎｍ，表观摩尔吸收系数为４．２×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，钯在０～１６μｇ／２５ｍＬ范围内符合比尔定律．常见金属离子及铂、金等贵金属离子均不干扰钯的测定．该方法具有简便、快速、选择性高的特点，可用于实际样品中微量钯的测定．The colour reaction of Palladium with 2,6 bisazo [4,4' (bis m phenylendiamine)] benzo[1,2 d: 4,5 d']bisthazole has been studied. In a solution of 5.8 mol/L H 2SO 4,Pd forms a stable complex with BDTADAB showing maximum absorption at 604 nm with a molar absorptivity 4.2×10 4 L·mol -1 ·cm -1 . Beer's law is obeyed in the range of 6～16 μg/25mL for Pd(II).The common metal ions and the precious metal ions such as Pt 4+ 、Au 3+ don't interfere. The method has been applied to the determination of Pd(II) in samples with satisfactory results.

关 键 词：BDTADAB 钯 显色反应 测定 分光光度法 

分 类 号：O614.823[理学—无机化学]