毛细管区带电泳法快速分离硝基酚和除草剂

Sensitive and Rapid Analysis of Nitrophenols and Herbicides by Capillary Zone Electrophoresis (CZE)

运用毛细管区带电泳法 ,通过在缓冲溶液中添加多阳离子化合物改变电渗流方向的方法 ,快速分离了 11种一取代、二取代和三取代硝基酚及 4种在德国常用的除草剂Bromoxynil,DNOC ,Dinoterb和Ioxynil。使用UV检测 ,这些化合物的检测限在 0 5mg/L～ 1 1mg/L。为满足环境样品分析的要求 ,使用固相萃取方法对样品进行了预处理 ,使硝基酚的检测限达到 1μg/L以下 ,并对实际样品进行了分析。

Nitrophenols and some acidic herbicides have been separated by modified CZE Good separation of such compounds can be achieved in less than 10 min by simply modifying the run buffer with organic solvents such as methanol, acetonitrile in a concentration of 40% ( V/V ) The limits of detection (LODs) for nitrophenols by UV absorption at 215 nm were 0 5 mg/L 1 1 mg/L. Solid phase extraction was used to preconcentrate nitrophenols and some herbicides to reach an LOD at μg/L levels Typical samples have been analyzed