离子液体和苯基双功能基键合固相微萃取涂层用于水样中多环芳烃的测定  

Ionic Liquid and Benzyl Double Functional Moiety Bonded Coating for Determination of Polycyclic Aromatic Hydrocarbons in Water Samples by Solid-phase Micro-extraction Coupled with Gas Chromatography

作　　者：周瑞娟 邢钧[2] 

机构地区：[1]宁夏回族自治区环境监测中心站,银川750001 [2]武汉大学化学与分子科学学院,武汉430072

出　　处：《分析化学》2013年第7期1115-1119,共5页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(No.20775056)资助项目

摘　　要：以含离子液体基团的三烷氧基硅烷和二苯基二甲氧基硅烷为前体,通过溶胶-凝胶法制备了一种含键合离子液体和苯基双功能基的SPME涂层,该涂层的使用温度可达340℃。优化了萃取温度和时间、盐效应以及解析温度和时间,确定NaCl为4 g、80℃平衡50 min、300℃解吸5 min为最优条件,并在该条件下采用顶空固相微萃取结合GC/FID的方法测定水样中5种多环芳烃的检出限为0.002～0.083μg/L,其线性相关系数的平方均大于0.9973。东湖水样中5种痕量的PAHs的回收率介于71.4%～107.0%,相对标准偏差(RSD,n=5)为1.5%～5.3%。An ionic liquid （IL）bonded fiber coating was prepared by sol-gel process, in which triethoxysilane, diphenyldimethoxysilane and y-triethoxysilyl-propyl-methyl-imidazolebis （ trifluoromethane sulfona-mide ） salt [ TPMIM ] [ NTf2 ] were employed as precursors. The coating was conditioned at 340℃ before use. The condi- tions of extraction temperature and time （at 80℃ for 50 min）, the effects of salt （ NaC1 of 4 g）, temperature and time of resolution （at 300℃ for 5 min） were optimized. Under the optimal conditions, an Hs SPME-GC- FID method was successfully established for the determination Of PAHs in water sample. The detection limits for five PAHs tested were between O. 002 and 0. 083 μg/L, the coefficients of correlation was in the range of 0. 9973-0. 9998. For the lake water spiked with 0.3 and 10 μg/L PAHs, the recoveries varied from 71.4% to 107.0%, and the RSDs were between 1.5%and 5.3% （n=5）.

关 键 词：固相微萃取 离子液体 二苯基二甲氧基硅烷 多环芳烃 

分 类 号：X832[环境科学与工程—环境工程] O658.2[理学—分析化学]