数字农科院2.0

Preparation of molecularly imprinted polymer with class-specific recognition for determination of 29 sulfonylurea herbicides in agro-products

文献类型： 外文期刊

作者： Feng Gege;Sun Jianchun;Wang Miao;Wang Mengqiang;Li Zhuang;Wang Shanshan;Zheng Lufei;Wang Jing;She Yongxin;Abd El-Aty A. M.

作者机构：

关键词： Agro-products; LC-MS/MS; Molecularly imprinted polymer; Residue detection; Solid-phase extraction; Sulfonylurea herbicides

期刊名称： Journal of Chromatography A

ISSN： 0021-9673

年卷期： 2021 年 1647 卷

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： Molecularly imprinting polymers with high selectivity toward 29 sulfonylurea herbicides were synthesized by precipitation polymerization, using metsulfuron-methyl and chlorsulfuron as the template molecule, 4-vinylpyridine as the function monomer, divinylbenzene as the crosslinking agent, and acetonitrile as porogen. The imprinted polymers were characterized and measured by scanning electron microscopy (SEM) and equilibrium adsorption experiments. The molecularly imprinted polymers displayed specific recognition for the tested 29 sulfonylurea herbicides, and the maximum apparent binding capacity was found to be 18.81 mg/g. The synthesized polymer was used as a solid-phase extraction (SPE) column coupled with liquid chromatography-tandem mass spectrometry (LC-MS/MS) for determination of the tested analytes in agro-products. Within the range of 2-100 μg/L, the tested analytes have achieved a good linear association with correlation coefficient (R2) > 0.999. The calculated limits of detection (LODs, S/N=3) as along with limits of quantification (LOQs, S/N=10) were in the ranges of 0.005-0.07 μg/L and 0.018-0.23 μg/L, respectively. Under different spiking levels, the recovery rates were ranged from 74.8% - 110.5%, and the relative standard deviation (RSDs) were < 5.3%. Finally, the feasibility of the proposed methodology was successfully applied for detection of sulfonylurea herbicides in crops, vegetables, and oils samples. © 2021

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