新显色剂间氯苯重氮氨基偶氮苯的合成及其与镉显色反应的研究  

Synthesis of a New Chromogenic Reagent m-Chlorobenzenediazoaminoazobenzene and Study on the Color Reaction with Cadmium

作　　者：王永丰[1] 

机构地区：[1]淮北煤炭师范学院化学系

出　　处：《光谱实验室》1994年第2期10-14,共5页Chinese Journal of Spectroscopy Laboratory

摘　　要：本文报道了新显色剂间氯苯重氮氨基偶氮苯的合成、纯化及结构鉴定。研究了该试剂与镉的显色反应，在非离子表面活性剂ＴｒｉｔｏｎＸ－１００存在下，于ｐＨ１０．０的Ｎａ２Ｂ４Ｏ７－ＮａＯＨ缓冲介质中，试剂可与镉形成２：１的红橙色配合物，其配合物的最大吸收波长位于４９０ｎｍ，表观摩尔吸光系数为１．１１×１０５Ｌ，ｍｏｌ－１．ｃｍ－１，镉量在０—１５μｇ／２５ｍＬ范围内遵循比耳定律。方法曾用于铝合金标样及合成水样中微量镉的测定，获得满意结果。A new triazene reagent m-chlorobenzenediazoaminoazbenzene has been synthesized,purified and identified. the color reaction of this reagent with Cadmium has been stuided.The results show that in the presence of Triton X-100 and at pH10.0 borax buffer solution, reagent reacts with Cadmium to form a red-orange stable complex with a molar ratio of 2 : 1, Which has a maximum absorption at 490nm, The molar absorptivity is 1. 11×105L. mol-1·cm-1, Beer's law is obeyed in the range of 0-15μgCd(Ⅱ) per 25mL. The method has been applied to determination of trace Cadmium in aluminium alloy and synthetic water samples with satisfactory results.

关 键 词：镉 间氯苯 重氮氨基 偶氮苯 显色剂 

分 类 号：O625.65[理学—有机化学]