工业废水中酚类污染物的毛细管电泳—安培检测应用研究(英文)  

Simultaneous determination of phenolic pollutants in wastewater using CE-AD

作　　者：李自成[1,2,3] 唐菀融[1] 朱金坤[1] 王清江[1] 何品刚[1] 方禹之[1] 

机构地区：[1]华东师范大学化学系,上海200062 [2]上海市闵行区环境监测站 [3]闵行环保局,上海201100

出　　处：《华东师范大学学报（自然科学版）》2013年第1期128-138,共11页Journal of East China Normal University(Natural Science)

基　　金：新世纪优秀人才支持计划(NCET-08-0191)~~

摘　　要：发展了毛细管电泳—安培检测方法,并将这一联用技术应用于苯酚、2,4-二氯苯酚、对硝基苯酚和邻、间、对甲酚的同时分离检测中.考察了氧化还原电位、缓冲溶液酸度、盐度、分离驱动电压及进样时间等因素对分析检测的影响.在优化实验条件下,以Na_2HPO_4-NaOH(pH11.38)为缓冲体系,6种酚类物质能够在25 min内实现基线分离,氧化还原电位0.78 V(versusSCE)下可以定量检测(三电极体系为:直径为300μm的碳圆盘电极、饱和甘汞电极及铂电极).实验结果表明,其线性达3个数量级(S/N=3),检测限达10^(-7)mol/L.本文还尝试把该方法应用于两个实际工业污水的酚类污染物的检测,其回收率为94.0%～107.0%,结果令人满意.因此,该方法可为政府及企业环境检测部门提供一种快速、准确、低廉、无污染、重现性高的质量控制方法.A method based on capillary electrophoresis coupled with amperometric detection （CE-AD） was developed for the simultaneous determination of phenols： 2,4-dichlorophenol, p- nitrophenol, o-cresol, m-cresol and p-cresol. The effects of working electrode potential, pH and concentration of running buffer, separation voltage and injection time on CE-AD were investiga- ted. Under the optimum conditions, the aim analytes could be separated in buffer solution of Na2 HPO4-NaOH at pH 11.38 within 25 min. A 300 /,m diameter carbon disk electrode genera ted good current responses at ＋ 0.78 V （vs SCE） for all analytes. The current responses were linear with concentrations over three orders of magnitude with detection limits at 10-7 mol/L （S/N = 3） and the recoveries were in the range of 94.0-107.0 %. This method could be successfully applied to the analysis of actual sample from coking plants with satisfactory results.

关 键 词：毛细管电泳 分离 安培检测 污水 酚类污染物 

分 类 号：X132[环境科学与工程—环境科学]