工业废水中酚类污染物的毛细管电泳—安培检测应用研究

李自成; 唐菀融; 朱金坤; 王清江; 何品刚; 方禹之

工业废水中酚类污染物的毛细管电泳—安培检测应用研究

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闵行环保局,上海 201100

详细信息

中图分类号: X132
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出版历程
- 收稿日期: 2012-01-01
- 修回日期: 2012-04-01
- 刊出日期: 2013-01-25

Simultaneous determination of phenolic pollutants in wastewater using CE-AD

1.
Department of Chemistry, East China Normal University, Shanghai 200062, China;
2.
Minhang Environmental Monitoring Station, Minhang Environmental Protection Bureau, Shanghai 201100, China

摘要

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Na2HPO4-NaOH（pH 11.38）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 (versus SCE) 下可以定量检测（三电极体系为：直径为300 m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10-7mol/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.
- 毛细管电泳 /
- 分离 /
- 安培检测 /
- 污水 /
- 酚类污染物
Abstract: 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 investigated. Under the optimum conditions, the aim analytes could be separated in buffer solution of Na2HPO4-NaOH at pH 11.38 within 25 min. A 300 m diameter carbon disk electrode generated 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 10-7mol/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.
- capillary electrophoresis /
- separation /
- amperometric detection /
- wastewater /
- phenolic compounds

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参考文献(1)

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