废水中硝基苯的分光光度法测定研究  

Studies on Spectrophotometric Determination of Nitrobenzene in Waste Water

作　　者：陈颖[1] 梁凯[1] 徐辉[1] 王淑英[1] 

机构地区：[1]首都师范大学化学系

出　　处：《北京师范学院学报（自然科学版）》1998年第3期72-76,共5页

基　　金：北京市教委基金

摘　　要：本文提出了分光光度法测定硝基苯的新方法．在碱性介质中，二氧化硫脲可将硝基苯还原为苯胺，经重氮化后，与萘乙二胺偶联，生成紫红色偶氮染料，其最大吸收波长为５５２ｎｍ．检测限为４μｇ·Ｌ－１，硝基苯含量在０～１ｍｇ／Ｌ范围内符合朗伯比尔定律，其摩尔吸光系数为３０９×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，操作简便，结果满意． new method for the determination of nitrobenzene has been proposed in this paper.Nitrobenzene can be reduced to aniline by thiourea dioxide in al kaline medium.After diazotization,it can be coupled with N (1 Naphthyl) ethylene diamine to form a purplishred a zoic dyestuff.The maximum absorption exhibits at 552nm and the apparent molar absorptivity is 3.09×10~4L·mol^-1·cm^-1,Beer′s law is obeyed over the range of 0～1mg/L and the detection limit is 4μg·L^-1.The method is simple and the results are satisfactory.

关 键 词：废水 硝基苯 分光光度法 碱性介质 二氧化硫脲 朗伯-比尔定律 摩尔吸光系数 显色条件 显色干扰 水样测定 

分 类 号：X132[环境科学与工程—环境科学] O625.611[理学—有机化学]