色谱

色谱 ›› 2012, Vol. 30 ›› Issue (04): 345-349.DOI: 10.3724/SP.J.1123.2011.12075

• 特别策划 • 上一篇    下一篇

液相微萃取-离子色谱法测定污水中痕量芳香胺

诸寅1, 朱岩2, 王丽丽1*   

  1. 1. 浙江工业大学化学工程与材料学院, 浙江 杭州 310014; 2. 浙江大学西溪校区化学系, 浙江 杭州 310028
  • 收稿日期:2011-12-20 修回日期:2012-02-21 出版日期:2012-04-28 发布日期:2012-04-28
  • 通讯作者: 王丽丽,教授,主要研究方向为色谱技术. Tel: (0571)88320416
  • 基金资助:

    1. 浙江工业大学化学工程与材料学院, 浙江 杭州 310014; 2. 浙江大学西溪校区化学系, 浙江 杭州 310028

Determination of trace aromatic amines in waste water using microextraction combined with ion chromatography

ZHU Yin1, ZHU Yan2, WANG Lili1*   

  1. 1. College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China; 2. Department of Chemistry, Zhejiang University, Hangzhou 310028, China
  • Received:2011-12-20 Revised:2012-02-21 Online:2012-04-28 Published:2012-04-28

PDF

326

被引次数

36

摘要： 基于中空纤维液相微萃取技术，建立了河流污水中两种芳香胺类物质（邻甲苯胺和对氯苯胺）的离子色谱分析方法。采用中空纤维液相微萃取和离子色谱联用技术，对中空纤维萃取条件进行优化。优化的萃取条件：萃取溶剂为正辛醇，供体相中NaOH的浓度为0.01mol/L, NaCl的浓度为500g/L,接受相中HCl的浓度为0.1 mol/L，搅拌速度为430r/min，萃取时间为30min，在优化条件下，邻甲苯胺的富集倍数为88倍，对氯苯胺的富集倍数为124倍。供体相中邻甲苯胺和对氯苯胺的浓度在0.005–0.1mg/L范围内成良好线性，相关系数为0.9998-0.9999 ，检出限为0.2-0.5μg /L，相对标准偏差为0.85-3.38 %。结论：这种方法操作简单，环境友好，提高了离子色谱检测芳香胺类物质的灵敏度。

关键词: 芳香胺, 离子色谱, 污水, 液相微萃取, 中空纤维

Abstract: Liquid-phase microextraction with porous hollow ?bers is a novel pretreatment technology which integretes sampling,extration and concentration into one step. In the past few years, with the development of ion chromatography, it is possible to determine aromatic amines with cation exchange column. In this work, a new method for the determination of trace aromatic amines, incuding o-toluidine and 4-chloroaniline in waste water was developed by hollow fiber membrane extraction with ion chromatography. Chromatographic conditions were optimized. The optimal extraction conditions were as follows: 1-octanol as organic phase with 500g/L NaCl and 0.01 mmol/L NaOH as donor phase, while 0.1 mmol/L HCl as receiving phase, at stirring rate of 430 r/min for 30 min. The linear ranges of o-toluidine and 4-chloroaniline was 0.005–0.1mg/L, with correlation coeffcients larger than 0.999. Detection limits of o-toluidine and 4-chloroaniline were 0.2 μg /L and 0.5 μg /L with RSD at 0.85 % and 3.38 % , respectively. The method has been applied to analyze trace aromatic amines, incuding o-toluidine and 4-chloroaniline in simulated waste water.

Key words: aromatic amines, hollow fiber membrane, ion chromatography, liquid phase microextraction