Fecha de publicación: 20/11/2024 Fuente: "milk OR dairy products" J Hazard Mater. 2024 Nov 15;481:136530. doi: 10.1016/j.jhazmat.2024.136530. Online ahead of print.ABSTRACTPolycyclic aromatic hydrocarbons (PAHs) are a class of persistent organic pollutants with strong carcinogenicity and mutagenicity, which cause great harm to the environment and food. Herein, a composite (NH2-MIL-88@PCN-224) was prepared through a guest PCN-224 in situ grown on the host NH2-MIL-88 by a surfactant-assisted growth strategy, and successfully applied for solid-phase microextraction (SPME) of PAHs from milk samples. The prepared SPME coatings exhibited high extraction and adsorption capacity for PAHs due to their porous structure, ultra-large specific surface area, strong π-π stacking, hydrophobic interactions and size-matching effects. The SPME-GC-FID method based on NH2-MIL-88@PCN-224 coated fibers has the significant advantages of wide linear range (1-200 ng mL-1), low detection limit (0.003-0.020 ng mL-1), high recoveries (92.15-106.64 %) and good reproducibility. This work overcomes the lattice-matching limitation by adopting a surfactant-assisted growth strategy, which offers a new direction for the preparation of ultra-high-performance SPME coatings with extremely high extraction efficiency, exceptional thermal stability, and long service life, and greatly expands the variety of MOF SPME coatings.PMID:39566461 | DOI:10.1016/j.jhazmat.2024.136530