QuEChERS in Combination with Ultrasound-Assisted Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Droplet Method for the Simultaneous Analysis of Six Fungicides in Grape
文献类型： 外文期刊
作者： You, Xiangwei 1 ; Jiang, Wenqing 1 ; Liu, Fengmao 1 ; Liu, Congyun 2 ;
作者机构： 1.China Agr Univ, Coll Sci, Beijing 100193, Peoples R China
2.Guangdong Acad Agr Sci, Res Ctr Qual Safety & Stand Agr Prod, Guangzhou 510640, Guangdong, Peoples R China
关键词： UA-DLLME-SFO;QuEChERS;Fungicides;Residues;Grape;HPLC-UV
期刊名称：FOOD ANALYTICAL METHODS （ 影响因子：3.366； 五年影响因子：3.07 ）
ISSN： 1936-9751
年卷期： 2013 年 6 卷 6 期
页码：
收录情况： SCI
摘要： A method for simultaneous analysis of six fungicides in grape was developed by using ultrasound-assisted dispersive liquid-liquid microextraction based on solidification of floating organic droplet method (UA-DLLME-SFO) combined with high-performance liquid chromatography equipped with UV detector (HPLC-UV). The extractant was obtained from grape samples using the modified QuEChERS (acronym of quick, easy, cheap, effective, rugged, and safe) method. Then the target fungicides were rapidly transferred from the acetonitrile extract to the phase of 100 mu L of 1-undecanol, which is of low density, low toxicity, and proper melting point near room temperature using UA-DLLME-SFO. Experimental parameters affecting the extraction efficiency were studied and optimized. Under the optimum conditions, recovery tests were carried out at three different concentrations. The average recoveries ranged from 72.5 % to 100.6 % with relative standard deviations of 0.8 % to 7.3 % (n = 5). The limits of quantifications of the method for all the target fungicides varied from 0.5 to 5 mg kg(-1), which were lower than the MRLs established by Codex Alimentarius Commission and USA. Compared with the conventional method, the proposed method is easy, fast, economic, and less toxic and avoids conventional concentration methods like rotary evaporation and nitrogen stream drying.
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