一种新型快速筛查水中多氯联苯的方法

A Novel Method for Rapid Screening of Polychlorinated Biphenyls in Water

近年来对于水中持久性有机物的生产和排放的管控日渐增强,但持久性有机物依然是环境健康潜在的危险所在。对于这些持久性化合物的监测和评估不得不依赖昂贵且费时的常规方法。介绍了一种新型的基于荧光检测多氯联苯的快速检测方法,基于苯并a芘(BaP)与多氯联苯(PCB)之间形成的交互作用使BaP荧光强度随着PCB的浓度的增大而增强。从而实现不用复杂前处理,即可以通过荧光检测BaP的强度判断PCB的浓度含量等级。为了确定这种交互作用的选择性和基质影响性,对pH、离子强度模拟实际地下水条件也展开了研究。结果表明,这些条件对于PCB/BaP间的作用影响很小,从而增大了将此方法应用于实际检测的可能性。氯原子的数目对于PCB/BaP间的作用具有显著的影响。

Although the control of the production and discharge of persistent organic matter in water has increased in recent years, persistent organic matter remains potential danger to human health.Despite obtained great attention, the monitoring and evaluation of these persistent compounds has relied on expensive and time consuming conventional methods.A novel method for the detection of polychlorinated biphenyls based on fluorescence detection was described.The interaction between benzopyrene(BaP) and polychlorinated biphenyls(PCB) enhanced with increased PCB concentration which reflected on BaP fluorescence intensity.Therefore, it is possible to initially determine the concentration level of PCB by detecting the intensity of BaP by fluorescence.In order to determine the selectivity and matrix influence of this interaction, the actual groundwater conditions for pH and ionic strength simulation were also investigated.These conditions had little effect on the interaction between PCB/BaP,which increased the possibility of applying the method to actual detection.The number of chlorine atoms in the PCB has a significant effect on the interaction of PCB/BaP.