Enantioseparation and determination of triazole fungicides in vegetables and fruits by aqueous two-phase extraction coupled with online heart-cutting two-dimensional liquid chromatography

文献类型： 外文期刊

第一作者： Zeng, Huiyun

作者： Zeng, Huiyun;Zhang, Wei;Xie, Xiujuan;Huang, Yejing;Chen, Jieming;Liu, Yingtao;Mai, Xiaoman;Fan, Huajun;Zhang, Yi;Deng, Jianchao;Xie, Xiujuan

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关键词： Aqueous two-phase extraction; Triazole fungicides; Two-dimensional liquid chromatography; Online heart-cutting; Enantioseparation; Vegetable; Fruit

期刊名称：FOOD CHEMISTRY （ 影响因子：7.514； 五年影响因子：7.516 ）

ISSN： 0308-8146

年卷期： 2019 年 301 卷

页码：

收录情况： SCI

摘要： A novel method for determination of triazole fungicides and their enantiomers in foods was developed by aqueous two-phase extraction (ATPE) coupled with two-dimensional liquid chromatography (2D-LC). With an aqueous two-phase system (ATPS) of ethanol/K2HPO4 as biphasic extractant, the effects of the ATPS composition, extraction temperature and time on extraction yields of triazole fungicides were investigated. Optimum conditions were concluded as follows: ethanol concentration 31% (w/w) and K2HPO4 concentration 21% (w/w), extraction temperature 60 degrees C, extraction time 21 min. Based on reversed-phase separation systems, a 2D-LC was constructed by optimizing chromatographic conditions and online heart-cutting procedures. As a result, eight triazole fungicides and their enantiomers were separated respectively on C18 and cellulose-tris (3,5-dimethyl-phenylcarbamate) stationary phases, revealing good linear relationship in the range of 0.1218-30.06 mu g/mL (R-2 >= 0.9984). The detection limits and recoveries were 0.03113-0.3525 mu g/mL and 71.57-107.8%, respectively. The ATPE-2D-LC method was successfully applied to chiral analysis of triazole fungicides in fruits and vegetables.

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