期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 429, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2022.128288
关键词
5-Nitroimidazoles; Kaempferol; Hypercrosslinked polymer; Solid-phase extraction; High performance liquid chromatography; Determination
资金
- National Natural Science Foundation of China [32072295, 31671930]
- Natural Science Foundation of Hebei Province [B2020204001, C2020204020, C2020204136, B2021204006, C2018204076]
- Food Processing Discipline Group of Hebei Agri-cultural University [2020-10]
- Scientific and Technological Research Foundation of the Department of Education of Hebei Province [ZD2021060, ZD2020196, QN2019034]
In this study, a series of novel hydroxyl-functional hypercrosslinked polymers were prepared using natural and environmentally benign kaempferol. These polymers showed excellent adsorption performance to 5-nitroimidazoles (5-NDZs). By applying these polymers as solid-phase extraction adsorbents, a sensitive method was developed for the enrichment of 5-NDZs in water, honey and fish samples. The method showed good linearity, low detection limits, and high recovery rates.
A series of novel hydroxyl-functional hypercrosslinked polymers (named as HCPs-Kae) were fabricated using natural and environmentally benign kaempferol as monomer via one-step Friedel-Crafts reaction. The prepared HCP-Kae1-24 h exhibited large surface area, good hydrophilicity and excellent adsorption performance to 5-nitroimidazoles (5-NDZs). Thus, by applying HCP-Kae1-24 h as a solid-phase extraction adsorbent, a sensitive method was developed for enrichment of 5-NDZs including metronidazole, ronidazole, secnidazole, dimetridazole and ornidazole prior to high performance liquid chromatography analysis. Under the optimum conditions, good linearities were achieved in the range of 0.10-100.0 ng mL(-1) for water, 1.3-500.0 ng g(-1) for honey, and 1.7-100.0 ng g(-1) for fish meat. The detection limits of the method were 0.03-0.05 ng mL(-1), 0.4-1.0 ng g(-1), 0.5-1.0 ng g(-1) for water, honey and fish meat, respectively. High method recovery was obtained in the range of 84-118% with relative standard deviations lower than 8.9%. The established method was successfully applied to the detection of 5-NDZs in environmental water, honey and fish samples. This work provides a new strategy for constructing hydroxyl-functional HCPs by using natural resource as robust adsorbent for adsorption/extraction applications.
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