Capillary Electrochromatography with Liquid Crystal Crown Ether Modified Hybrid Silica Monolith for Analysis of Imidacloprid and Carbendazim in Tomatoes
文献类型： 外文期刊
作者： Wang, Mingming 1 ; Feng, Rui 1 ; Shen, Jing 2 ; Chen, Hao 1 ; Zeng, Zhaorui 3 ;
作者机构： 1.Huazhong Agr Univ, Coll Sci, Wuhan 430070, Peoples R China
2.Hubei Acad Agr Sci, Inst Agr Qual Stand & Testing Technol, Wuhan 430064, Peoples R China
3.Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China
关键词： Capillary electrochromatography;Liquid crystal crown ether modified hybrid silica monolith;Imidacloprid;Carbendazim;Tomato
期刊名称：BULLETIN OF THE KOREAN CHEMICAL SOCIETY （ 2020影响因子：0.969； 五年影响因子：0.691 ）
收录情况： SCI
摘要： This study describes the ability of capillary electrochromatography (CEC) for the determination of imidacloprid and carbendazim in tomato samples. A novel liquid crystal crown ether modified hybrid silica monolithic column was synthesized, characterized and developed as separation column for the first time. Baseline separation of imidacloprid and carbendazim could be achieved using a mobile phase containing 90% (v/v) 20 mmol/L phosphate buffer (pH 7.0) and 10% (v/v) acetonitrile. The matrix matched calibration curves were linear with correlation coefficient r~2 > 0.9998 in the range of 0.20-10.00 mg/L. The limits of detection for imidacloprid and carbendazim were 0.061 and 0.15 mg/kg, respectively, which were below the maximum residue limits established by the European Union as well as Codex Alimentarius. Average recoveries for imidacloprid and carbendazim varied from 101.6-108.0% with relative standard deviations lower than 6.3%. This method was applied to the analysis of tomatoes collected from local markets.
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