Detection of Aldehydes in Meat Products Based on Sulfonated Polystyrene Microspheres Modified with 2,4-Dinitrophenylhydrazine as Membrane-Protected Solid-Phase-Extraction Adsorbents

), satisfactory recovery rates (72-107%), and relatively accurate precisions (1-11%). Moreover, the proposed method also eliminated interferences using a polytetrafluoroethylene (PTFE) membrane in the µ-SPE device and could realize extraction, separation, enrichment, and derivatization integration in one step. Therefore, the developed method provides a promising alternative to the reported methods.