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
作者： Zeng, Huiyun 1 ; Xie, Xiujuan 2 ; Huang, Yejing 2 ; Chen, Jieming 2 ; Liu, Yingtao 2 ; Zhang, Yi 3 ; Mai, Xiaoman 2 ; Den 1 ;
作者机构： 1.Guangdong Pharmaceut Univ, Sch Basic Courses, Guangzhou 510006, Guangdong, Peoples R China
2.Guangdong Pharmaceut Univ, Sch Pharm, Guangzhou 510006, Guangdong, Peoples R China
3.Shenzhen Entry Exit Inspect & Quarantine Bur, Food Inspect Ctr, Shenzhen 518045, Peoples R China
4.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510620, Guangdong, Peoples R China
5.Thermo Fisher Sci, Shanghai 201206, Peoples R China
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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