Determination of Triazole Fungicide Residues in Fruits by QuEChERS Combined with Ionic Liquid-Based Dispersive Liquid-Liquid Microextraction: Optimization Using Response Surface Methodology

文献类型： 外文期刊

第一作者： Zhang, Yaohai

作者： Zhang, Yaohai;Nie, Jiyun;Zhang, Yaohai;Jiao, Bining;Zhao, Qiyang;Zhang, Yan

作者机构：

关键词： Ionic liquid (IL);Dispersive liquid-liquid microextraction (DLLME);QuEChERS;Triazole fungicides;Response surface methodology;Fruits

期刊名称：FOOD ANALYTICAL METHODS （ 影响因子：3.366； 五年影响因子：3.07 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： A rapid, efficient, and environmentally friendly method using quick, easy, cheap, effective, rugged, and safe (QuEChERS) combined with ionic liquid-based dispersive liquid-liquid microextraction (QuEChERS-IL-DLLME) prior to high-performance liquid chromatography coupled with photodiode array detection (HPLC-PDA) has been developed for the determination of six triazole fungicides (triazolone, triadimenol, epoxiconazole, flusilazole, tebuconazole, and diniconazole) in various fruits (pear, apple, and grapefruit). Several parameters affecting the extraction efficiency in IL-DLLME, such as type and volume of ionic liquid and acetonitrile volumes and extraction time, were investigated by single factor experiments. Then, the extractant volume, dispersant volume, and extraction time were optimized using response surface methodology (RSM). The optimal values were determined to be within an extractant volume of 63.7 mu L, a dispersant volume of 0.43 mL, and an extraction time of 1.7 min, respectively. Under the optimum conditions, an excellent linearity with determination coefficient higher than 0.997 was obtained. The average recoveries in three concentration levels (0.2, 0.5, and 1 mg kg(-1)) ranged from 63.8 to 119.1 %, respectively, and the relative standard deviations (RSDs) from 1.1 to 12.6 %. The limits of detection (LODs) (S/N = 3) and limits of quantification (LOQs) (S/N = 10) for the six triazole fungicides ranged from 3.4 to 26.8 mu g kg(-1) and 9.8 to 50.3 mu g kg(-1), respectively. The proposed method was successfully applied for the determination of trace amounts of triazole fungicides in various fruits including pear, apple, and grapefruit.

分类号： TS2

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