摘要
近年来,分散液液微萃取作为一种新型液相微萃取(LPME)技术受到广泛关注。该技术具有操作简单、有机溶剂用量少、富集倍数高等显著优点,已被广泛用于各类样品基质中无机和有机分析物的提取。但由于传统分散液液微萃取技术的萃取剂以高毒性有机溶剂为主,且选择性差,从而严重限制了该技术的应用。为此,最近几年发展了许多操作模式,如低密度萃取剂分散液液微萃取、悬浮固化分散液液微萃取、调节萃取剂密度的分散液液微萃取、离子液体-分散液液微萃取、水溶液作为萃取剂的反相分散液液微萃取等。该文综述了分散液液微萃取技术原理、萃取过程和影响因素(如萃取剂与分散剂种类和体积、p H值、离子强度、萃取时间等),并对其在食品分析中的应用进展进行了系统总结。
In recent years,more and more attention has been focused on dispersive liquid-liquid microextraction（ DLLME） which appeared as a new liquid-phase microextraction（ LPME） technique.DLLME has been widely applied in the extraction of both inorganic and organic analytes from different matrices due to its simplicity of the procedure,low solvent consumption,and high enrichment factors from a wide gap between acceptor and donor phases. However,several innate drawbacks of DLLME like toxic extractant solvents used or a poor selection has restricted the technique＇s use in certain fields. Recent developments in DLLME operation mode,e. g.,low density solvent-based DLLME,DLLME based on solidification of floating organic drop,the use of an auxiliary solvent for adjustment of density of extraction mixture,the application of ionic liquid-based DLLME,and reversed-phase DLLME by using water as extractant in determination of some species in food are presented in the review. This work also describes the principle,procedure and influence factors including the type and volume of extractants and dispersers,the sample solution p H value,addition of salt and extraction time of this method.
出处
《分析测试学报》
CAS
CSCD
北大核心
2015年第5期616-624,共9页
Journal of Instrumental Analysis
基金
宁夏自然科学基金资助项目(NZ14275)
宁夏师范学院科研项目(YB201433
YB201435)
关键词
分散液液微萃取
食品分析
应用
综述
dispersive liquid-liquid microextraction（DLLME）
food analysis
application
review
作者简介
通讯作者：曹江平，助教，研究方向：分离科学与分离分析技术，Tel：0954—2079424，E—mail：jiangpingcao@126．com
