Novel core shell structured magnetic covalent organic frameworks were synthesized at room temperature and first applied in water samples for the enrichment of trace polybrominated diphenyl ethers (PBDEs) through magnetic solid-phase extraction. The prepared materials were characterized through transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, vibrating sample magnetometer and X-ray photoelectron spectroscopy. During adsorption, the parameters affecting extraction and desorption efficiency were further optimized. Combined gas chromatography and mass spectrometry (GC/MS) revealed that high enrichment factors (275–292), low limits of detection (0.12–0.38 ng·L⁻¹), wide linear ranges (0.5–1000 ng·L⁻¹), and good reproducibility (intra-day 1.40%–4.31% and inter-day 5.14%–9.12%) were obtained under optimal conditions. The method successfully detected PBDEs in different water samples.

在室温下合成了新型核壳结构的磁性共价有机骨架，并首次应用于水样中，通过磁性固相萃取富集痕量多溴二苯醚（PBDE）。通过透射电子显微镜、傅里叶变换红外光谱、X射线衍射、振动样品磁强计和X射线光电子能谱对所制备的材料进行了表征。吸附过程中，影响萃取和解吸效率的参数进一步优化。气相色谱和质谱联用 (GC/MS) 显示富集因子高 (275–292)、检测限低 (0.12–0.38 ng·L ⁻¹ )、线性范围宽 (0.5–1000 ng·L ⁻¹ ) ，并且在最佳条件下获得了良好的重现性（日内 1.40%–4.31% 和日间 5.14%–9.12%）。该方法成功检测了不同水样中的PBDEs。