Ionic liquid-based air-assisted liquid-liquid microextraction followed by high performance liquid chromatography for the determination of five fungicides in juice samples

被引:37
作者
You, Xiangwei [1 ,2 ]
Chen, Xiaochu [2 ]
Liu, Fengmao [2 ]
Hou, Fan [2 ]
Li, Yiqiang [1 ]
机构
[1] Chinese Acad Agr Sci, Tobacco Res Inst, Qingdao 266101, Peoples R China
[2] China Agr Univ, Coll Sci, Beijing 100193, Peoples R China
关键词
Ionic liquid-based air-assisted liquid-liquid microextraction Fungicide; Juice; High performance liquid chromatography; SOLID-PHASE MICROEXTRACTION; POLYCYCLIC AROMATIC-HYDROCARBONS; ENVIRONMENTAL WATER SAMPLES; FLAME IONIZATION DETECTION; GAS-CHROMATOGRAPHY; EMULSIFICATION-MICROEXTRACTION; MASS SPECTROMETRY; ORGANOPHOSPHORUS PESTICIDES; CONVENTIONAL MICROSYRINGE; PHTHALATE-ESTERS;
D O I
10.1016/j.foodchem.2017.06.074
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
A novel and simple ionic liquid-based air-assisted liquid-liquid microextraction technique combined with high performance liquid chromatography was developed to analyze five fungicides in juice samples. In this method, ionic liquid was used instead of a volatile organic solvent as the extraction solvent. The emulsion was formed by pulling in and pushing out the mixture of aqueous sample solution and extraction solvent repeatedly using a 10 mL glass syringe. No organic dispersive solvent was required. Under the optimized conditions, the limits of detection (LODs) were 0.4-1.8 mu g L-1 at a signal-to-noise ratio of 3. The limits of quantification (LOQs) set as the lowest spiking levels with acceptable recovery in juices were 10 mu g L-1, except for fludioxonil whose LOQ was 20 mu g L-1. The proposed method was applied to determine the target fungicides in juice samples, and acceptable recoveries ranging from 74.9% to 115.4% were achieved. (C) 2017 Published by Elsevier Ltd.
引用
收藏
页码:354 / 359
页数:6
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