SPME-GC联用测定沉积物中PCBs的影响因素  

Effect of Different Conditions on Determination of PCBs in Sediments by SPME-GC

作　　者：张秀雯[1,2] 郎春燕[1] 曹建平[2] 罗兰萍[2] 

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059 [2]广东石油化工学院,广东茂名525000

出　　处：《当代化工》2017年第2期207-210,共4页Contemporary Chemical Industry

基　　金：广东石油化工学院自然科学研究项目;项目号:513036

摘　　要：建立了固相微萃取-气相色谱联用测定沉积物中多氯联苯(PCBs)的分析方法,分析了实验过程中的各种条件因素对萃取效果的影响。结果表明,对于100μm PDMS萃取纤维头,在80℃条件下搅拌速率为450 r/min时萃取50 min后于280℃进样口解析6 min萃取效果最佳。该方法快捷、操作简单,7次平行测定的RSD为4.6%~11.4%,相对回收率为84.6%~107.4%,满足分析要求,可用于沉积物中PCBs的测定。A method for determination of polychlorinated biphenyls （PCBs） in sediments by solid phase micro-extraction combined with gas chromatography was developed.Effect of different conditions on extraction efficiency was discussed. The result shows that, when 100 μm polydimethylsiloxane （PDMS） is used in extraction at 80 ℃ for 50 min with stirring speed of 450 r/min, the sample extracts are desorbed for 6 min at 280 ℃ directly in the GC injector port, the extraction efficiency is best. The method is rapid and simple. The relative standard deviation （RSD） is 4.6%-11.4% with relative recovery rate from 84.6%-107.4%.The method can meet the analysis requirement, it can be applied into determination of PCBs in sediments.

关 键 词：固相微萃取(SPME) 多氯联苯(PCBs) 萃取条件 

分 类 号：O657.3[理学—分析化学]