Heterocyclic frameworks as efficient sorbents for solid phase extraction-high performance liquid chromatography analysis of nitroimidazoles in chicken meat
In this work, three aromatic heterocycle-based porous organic frameworks (heterocyclic POFs) were prepared through a simple Friedel-Crafts alkylation of furan, thiophene and pyrrole with p -dimethoxybenzene as crosslinker. The prepared heterocyclic POFs, featuring abundant heteroatoms and extended conjugated system, displayed high adsorption affinity for nitroimidazoles (NDZs) antibiotics. So, they were applied as adsorbents for solid phase extraction of NDZs (metronidazole, ronidazole, dimetridazole, ornidazole) from chicken meat before their determination by high performance liquid chromatography-ultraviolet detection. Good linearity range (2.0–100.0 ng g −1 ), low limits of detection (0.6–1.2 ng g −1 ), high recovery (84.0–114.5%) and satisfactory precision (relative standard deviations < 10%) for the NDZs were obtained under the optimized conditions. The developed method was successfully applied to determine NDZs s in chicken meat. This work provided a good alternative for the rapid and effective detection of trace NDZs residues in chicken meat samples.
危险品化学品经营许可证（带存储）