环境监测中POPs分析的关键问题与对策

Key Problems in Screening Analysis of Persistent Organic Pollutants (POPs) in Environmental Monitoring and Countermeasures

系统介绍了采用EPA8081A与8082方法进行环境样品中持久性有机污染物(POPs)分析的关键问题与对策。包括POPs的气相色谱分析与验证双柱系统,DDT与异狄氏剂在进样系统中的分解及其处理方法,应用目测识别法、手型法与透明复印胶片法等经验方法快速定性多氯联苯(PCBs)、氯丹与毒杀芬等多峰化合物,影响外标法准确定量PCBs、氯丹与毒杀芬等多峰POPs的关键因素,以及质量控制要求。提出应根据中国POPs的环境污染特点,建立相应的POPs标样库与标准图谱库,为中国的POPs污染调查与环境监测提供技术支持。

A systematic introduction is presented to key problems and their countermeasures in screening analysis of persistent organic pollutants （POPs） in environmental samples using EPA 8081 A and EPA 8082 methods, covering the double-column system for gas chromatographic analysis and validation of POPs, decomposition of DDT and endrin in the sample injection system and its countermeasures, rapid identification of multi-peaked compounds, such as polychlorinated biphenyl （PCBs） , chlordane and toxaphene with empirical methods, such as visual recognition method, ehiral method, transparent copy film method, etc. , key factors affecting the accuracy of quantification of multi-peaked POPs, such as PCBs, chlordane and toxaphene with the external standard method and requirements of quality control. It is, therefore, suggested that a library of standard samples and standard chromatographs of POPs be established in light of the characteristics of POPs pollution of the environment of China, so as to provide the survey and environmental monitoring of POPs pollution in China with effective technical support.