Preparation of metal-organic framework @molecularly imprinted polymers for extracting N-nitrosamines in salted vegetables

文献类型： 外文期刊

第一作者： Chen, Haiyan

作者： Chen, Haiyan;Wang, Xinyu;Lv, Meijin;Zhang, Ziping;Cao, Xiaolin;She, Yongxin

作者机构：

关键词： Metal organic framework; Molecularly imprinted polymers; N-nitrosamines; Solid phase extraction; Salted vegetables

期刊名称：JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES （ 影响因子：3.0； 五年影响因子：2.9 ）

ISSN： 1570-0232

年卷期： 2023 年 1231 卷

页码：

收录情况： SCI

摘要： In this paper, the novel metal-organic framework @molecularly imprinted polymers were prepared and applied in extracting N-nitrosamines from salted vegetables. The imprinted polymers were coated on the surface of MIL -101 using multi-dummy template molecules (5-nonanol, benzhydrol and N-formylpyrrolidine). The character-ization and adsorbing experiments showed that the hybrid imprinted polymers presented spherical particles with typically core-shell structure, and exhibited high adsorption capacity (maximum capacity: 46.85 mg/g) and fast equilibrium rate (only 5 min) for N-nitrosamines. Various parameters (sample loading solvent, pH, washing solvent, elution solvent and elution volume) affecting solid-phase extraction were optimized. Under the optimum conditions, the solid-phase extraction process based on the hybrid polymers combined with high performance liquid chromatography-ultraviolet detection method was established and applied to analyze N-nitrosamines in different salted vegetables. The results showed that the developed method produced the linear relationship between the peak areas versus the N-nitrosamines concentrations of 0.2-10 mu g/g with limit of detections from 20.6 to 76.1 ng/g. The spiked recovery of N-nitrosamines in the salted vegetable samples was in the range of 66-100.5 % with relative standard deviation from 0.1 to 3.4 %. Those results demonstrated that the established method was sensitive and efficient for directly enriching and analyzing trace N-nitrosamines in salted vegetables.

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