Selective solid-phase extraction based on molecularly imprinted technology for the simultaneous determination of 20 triazole pesticides in cucumber samples using high-performance liquid chromatography-tandem mass spectrometry

文献类型： 外文期刊

第一作者： Zhao, Fengnian

作者： Zhao, Fengnian;She, Yongxin;Zhang, Chao;Cao, Xiaolin;Wang, Shanshan;Zheng, Lufei;Jin, Maojun;Shao, Hua;Jin, Fen;Wang, Jing;Zhao, Fengnian;She, Yongxin;Zhang, Chao;Cao, Xiaolin;Wang, Shanshan;Zheng, Lufei;Jin, Maojun;Shao, Hua;Jin, Fen;Wang, Jing

作者机构：

关键词： Triazole pesticides;Molecularly imprinted polymers;Plant material;Solid-phase extraction;High-performance liquid chromatography tandem mass spectrometry

期刊名称：JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES （ 影响因子：3.205； 五年影响因子：3.068 ）

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收录情况： SCI

摘要： A selective analytical method for the simultaneous determination of 20 triazole fungicides and plant growth regulators in cucumber samples was developed using solid-phase extraction with specific molecularly imprinted polymers (MIPs) as adsorbents. The MIPs were successfully prepared by precipitation polymerization using triadimefon as the template molecule, methacrylic acid as the functional monomer, trimethylolpropane trimethacrylate as the crosslinker, and acetonitrile as the porogen. The performance and recognition mechanism for both the MIPs and non-molecularly imprinted polymers were evaluated using adsorption isotherms and adsorption kinetics. Liquid chromatography-tandem quadrupole mass spectrometry was used to identify and quantify the target analytes. The solid-phase extraction using the MIPs was rapid, convenient, and efficient for extraction and enrichment of the 20 triazole pesticides from cucumber samples. The recoveries obtained at three concentration levels (1, 2, and 10 mu g L-1) ranged from 82.3% to 117.6% with relative standard deviations of less than 11.8% (n = 5) for all analytes. The limits of detection for the 20 triazole pesticides were all less than 0.4 mu g L-1, and were sufficient to meet international standards.

分类号： Q503

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