分散液液微萃取-气相色谱法测定水中苯、甲苯和二甲苯  

Determination of benzene,toluene and xylenes in waters by gas chromatography with dispersive liquid-liquid microextraction

作　　者：张茂升[1] 黄佳蓉[2] 郑向华[3] 陈惠玲[1] 

机构地区：[1]漳州师范学院化学与环境科学系,漳州363000 [2]漳州出入境检验检疫局空罐实验室,漳州363000 [3]厦门出入境检验检疫局技术中心,厦门361012

出　　处：《分析试验室》2010年第6期85-88,共4页Chinese Journal of Analysis Laboratory

基　　金：福建省教育厅科技(JA07156)项目资助

摘　　要：以CHCl3为萃取剂,丙酮为分散剂,建立了基于分散液液微萃取(DLLME)结合气相色谱测定水样中苯、甲苯和二甲苯含量的新方法。实验对影响萃取效率的因素进行优化,萃取条件为:在1.0mL含有50g/LNaCl的样品溶液中加入40.0μLCHCl3和0.16mL丙酮,振荡分散均匀后,以400r/min离心5min,取萃取溶剂1.00μL直接进样分析。本方法线性范围为0.8～200μg/mL,相关系数r>0.9980,检出限为0.1μg/mL,回收率分别在93.5%～102.1%之间。将该方法与液液萃取法、单滴微萃取相比较,具有操作简单、富集效率高和灵敏度高等特点。A novel method for the determination of benzene,toluene and xylenes in water samples has been developed by dispersive liquid liquid microextraction (DLLME) coupled with gas chromatography,using chlorobenzene as an extraction solvent and acetone as a disperser.Experimental parameters,such as organic solvent volume,extraction time and salt effect were controlled and optimized.The optimal conditions were as follows:1.00 mL of water sample volume,50 g/L of NaCl,40.0 μL of chlorobenzene,0.16 mL of acetone,0 min ...

关 键 词：分散液相微萃取 气相色谱 苯 甲苯 二甲苯 

分 类 号：X832[环境科学与工程—环境工程]