复杂基质中短链氯化石蜡前处理方法的建立和优化  

Establishment and Optimization of Pretreatment Methods for Short-chained Chlorinated Paraffins in Complex Matrices

作　　者：高姗 李慧娟 陈相峰[1] 吕瑞敏[1] GAO Shan;LI Hui-juan;CHEN Xiang-feng;L Rui-min(Shandong Analysis And Test Center,Qilu University of Technology(Shandong Academy of Science),Jinan 250014;College of Life Sciences,Shandong Normal University,Jinan 250014)

机构地区：[1]山东省分析测试中心齐鲁工业大学(山东省科学院),山东济南250014 [2]山东师范大学生命科学学院,山东济南250014

出　　处：《分析科学学报》2019年第6期831-835,共5页Journal of Analytical Science

基　　金：国家自然科学基金(No.21906096);山东省科学院青年科学基金(No.2019QN008)

摘　　要：短链氯化石蜡(Short-chain Chlorinated Paraffins,SCCPs)是组成复杂且应用广泛的一类有机氯代混合物。本文比较了4种前处理方法对复杂基质中SCCPs的提取效率。实验结果表明,对于固体基质加速溶剂萃取法回收率达到94.6%,优于超声提取法(回收率63.4%);对于液体基质固相萃取回收率达到70.2%,优于液-液萃取法(回收率57.1%)。在此基础上建立了使用加速溶剂萃取,复合弗罗里硅土和硅胶层析柱净化固体基质中SCCPs的前处理方法。利用所建立的方法,对我国济南地区超市食品样品中SCCPs的污染水平和各同系物组分进行研究。该方法对食品样品的回收率范围在63%和96%之间。Short-chain chlorinated paraffins(SCCPs) are a group of synthesized organic chlorinated mixtures with complex composition and widely applications.In this study,the extraction efficiency of four pretreatment methods of SCCPs for complex matrix was compared,including accelerated solvent extraction(ASE),ultrasonic extraction,solid phase extraction(SPE),and liquid-liquid extraction.The results showed that the recovery of ASE is 94.6% for solid matrix,which is better than that of ultrasonic extraction(63.4%).For liquid matrix,the recovery of SPE is 70.2%,which is better than that of liquid-liquid extraction(57.1%).Furthermore,the pretreatment method of SCCPs extracted by ASE and purified by multilayer silica-Florisil composite column was established.The concentrations and congener profiles of SCCPs in the supermarket food samples were investigated using the established method.The recovery of SCCPs in food samples was between 63% and 96%.

关 键 词：短链氯化石蜡 前处理方法 净化 食品样品 

分 类 号：O657.63[理学—分析化学]