分散液液微萃取-气相色谱/质谱联用法测定饮用水源水中的四乙基铅  

Determination of Tetraethyl Lead in Drinking Source Water by Dispersive Liquid-liquid Microextraction Coupled with Gas Chromatography/Mass Spectrometry

作　　者：胡文凌[1] 叶朝霞[1] 庞明[1] 李蕾[2] 李莉[1] 

机构地区：[1]嘉兴市环境保护监测站,浙江嘉兴314000 [2]嘉兴学院生物与化学工程学院,浙江嘉兴314000

出　　处：《中国环境监测》2011年第4期57-60,共4页Environmental Monitoring in China

摘　　要：采用分散液液微萃取与气相色谱/质谱法联用技术建立了测定水样中四乙基铅的方法。考察了影响分散液液微萃取的因素,包括萃取溶剂、分散剂、萃取次数、萃取时间和盐效应等。在最佳条件下,四乙基铅的富集倍数为330倍,检出限为0.01μg/L(S/N=3),线性范围为0.10～10.0μg/L,线性相关系数为0.9992。测定饮用水源水中的四乙基铅,加标回收率为87.7%～105%,相对标准偏差为4.8%～7.3%(n=3)。A method for the determination of tetraethyl lead in drinking source water by dispersive liquid-liquid microextraction（DLLME） coupled with gas chromatography/mass spectrometry（GC/MS） was established.Some important parameters that affect the extraction efficiency of DLLME,such as the kind and the volume of extraction solvent,dispersive solvent,extraction times,extraction time and salt effect,were studied.Under the optimum conditions,the enrichment factor was 330,the limit of detection was 0.01μg/L（S/N=3）,the calibration graph is linear in the range of 0.10～10.0μg/L,with the correlation coefficients of 0.9992.The tetraethyl lead in the drinking source water was determined by this method.The recoveries of the method were 87.7% ～ 105%,and the relative standard deviations ranged from 4.8% to7.3%（n= 3）.

关 键 词：分散液液微萃取 气相色谱/质谱 四乙基铅 饮用水 

分 类 号：X830.2[环境科学与工程—环境工程]