A decanedioic acid-based hydrogen-bonded organic framework for dispersive micro solid phase extraction of polycyclic aromatic hydrocarbons in smoked rice samples

A hydrogen-bonded framework was successfully synthesized from sebacic acid via solvent evaporation through a self-assembly process. The prepared sorbent was characterized using various techniques including Fourier transform infrared spectrometry, X-ray diffraction, Brunauer-Emmett-Teller nitrogen sorption/desorption, and scanning electron microscopy to evaluate its structural and morphological properties. It was applied as the sorbent for the extraction of four polycyclic aromatic hydrocarbons from smoked-rice samples before their determination by gas chromatography-flame ionization detector. The proposed method coupled dispersive micro solid phase extraction with vortex-assisted liquid-liquid microextraction. The method exhibited extraction recoveries ranging from 47-76%, with enrichment factors of 159-366. The repeatability of the method was ≤ 13.8%, while the limits of detection and quantification were determined to be 0.72-3.21 and 2.37-10.6 µg L^-1, respectively. The results demonstrated that the sebacic acid-derived hydrogen-bonded organic framework possesses a strong affinity toward organic contaminants and can serve as an efficient sorbent for their extraction from complex food matrices. The proposed approach provided a simple and effective strategy for sample preparation and trace analysis of polycyclic aromatic hydrocarbons in food samples.