Preparation of a fluorinated metal-organic framework and its application for the dispersive solid-phase extraction of perfluorooctanoic acid

A fluorinated metal-organic framework material (F-MOF) was successfully prepared using tetrafluoroterephthalic acid (H 2 tfbdc) as the ligand and Zn(II) as the central metal ion. The F-MOF exhibited excellent adsorption performance for perfluorooctanoic acid (PFOA), with a maximum adsorption capacity of 419.8 mg g −1 . A sensitive dispersive solid-phase extraction using the F-MOF as an adsorbent, coupled with GC–MS analysis, was developed for detecting trace PFOA with a limit of detection as low as 2.6 ng L −1 . This method was applied to detect PFOA in environmental water samples, yielding satisfactory results.