对比液液萃取与固相萃取在气相色谱-串联质谱法检测水中27种半挥发性有机污染物中的应用  

Comparision of liquid-liquid extraction and solid phase extraction in the analysis of 27 semivatile organic compounds in water by gas chromatography-mass spectrometry

作　　者：武法伟 袁鹏辉 陈明晓 董军[1] 高帅 

机构地区：[1]山东省地矿工程勘察院,济南250014 [2]中国石油大学(北京)重质油国家重点实验室,北京102249

出　　处：《分析试验室》2017年第9期1042-1047,共6页Chinese Journal of Analysis Laboratory

基　　金：山东省地质勘察项目(SSDZS-2015-GTT01)资助

摘　　要：以有机氯类、有机磷类、氯酚类、多环芳烃类、氨基甲酸酯类、菊酯类及三嗪类共7类27种半挥发性有机污染物(SVOCs)为研究对象,以气相色谱-串联质谱技术为基础,对27种SVOCs的前处理方法—液液萃取和固相萃取进行了比较。研究发现:液液萃取法成本低,操作相对复杂,一次最多只能保证26种SVOCs(五氯酚需要单独反萃取)的回收率在70%~120%,但五氯酚和菊酯类农药的液液萃取效果要优于固相萃取,适用于少数样品的分类检测分析;而固相萃取自动化程度高,样品重现性好,检测限低,能够同时满足27种目标物的回收率在70%~120%,适合用大批量、多种类的检测分析;可根据实验室条件以及任务要求选择适当的分析方法。A total of 27 semivolatile organic pollutants（ SVOCs） as the research objects were isolated from organochlorines, organophosphates, chlorophenols, polycyclic aromatic hydrocarbons,carbamates,pyrethroids and triazines,respectively. With gas chromatography-mass spectrometry（ GCMS） technique,both liquid-liquid extraction and solid phase extraction were discussed and compared to prepare the samples of 27 SVOCs in this study. The results showed that liquid-liquid extraction method islow cost and has relatively complicated operations. The recoveries of 26 SVOCs were found from 70% to 120% at one time by using the method of liquid-liquid extraction,and the extraction effect of pentachlorophenol and pyrethroid pesticide by this method is superior to that of solid-phase extraction. The liquid-liquid extraction is applicable to a few samples of the classification detection and analysis,while by using solid phase extraction method,the recoveries of 27 SVOCs can reach from70% to 120%,indicating that the solid phase extractionhas the advantage of simple operation,quick analysis speed,good sensitivity,recovery and reproducibility. Therefore,laboratory technicians can select the appropriate sample preparation method based on laboratory conditions and task requirements.

关 键 词：固相萃取 液液萃取 色谱质谱 选择离子检测 半挥发性有机污染物 

分 类 号：X832[环境科学与工程—环境工程]