分散液相微萃取技术研究进展

Developments of Dispersive Liquid-Liquid Microextraction Technique

分散液相微萃取是最近发展起来的一种新型样品前处理技术,该方法操作简单、成本低、富集效率高、所需有机溶剂用量极少,是一种环境友好的液相微萃取新技术。与悬滴液相微萃取和中空纤维液相微萃取相比,萃取时间大为缩短。分散液相微萃取可与气相色谱、液相色谱和原子吸收分光光度计等仪器联用,并已在环境样品、食品样品分析中得到了较广泛的应用。本文对分散液相微萃取的基本原理、影响富集效率的因素和目前的应用研究进展进行了评述。

Dispersive liquid-liquid microextraction（DLLME） is a novel environmentally benign sample-preparation technique, possessing obvious advantages of simplicity of operation, low-cost, high enrichment factor and low consumption of organic solvent. Compared with single drop microextraction（SDME） and hollow fiber- based liquid-phase microextraction, the extraction time of DLLME is greatly shortened. DLLME coupled with gas chromatography, high performance liquid chromatography and atomic absorption spectrometry, etc. , has been widely applied in the analysis of environmental and food samples. The basic principles, parameters affecting the extraction efficiency, and the latest applications of DLLME are reviewed.