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

## TL;DR

A new method using modified microspheres effectively detects aldehydes in meat during cooking, offering high accuracy and precision.

## Contribution

A novel membrane-protected µ-SPE method using dinitrophenylhydrazine-modified microspheres for aldehyde detection in meat.

## Key findings

- The method achieved excellent linear regression (0.9921–0.9993) and low detection limits (0.010–0.621 ng g−1).
- Recovery rates ranged from 72% to 107% with precision between 1% and 11%.
- The method integrates extraction, separation, enrichment, and derivatization in one step.

## Abstract

Sulfonated polystyrene (sPS) microspheres modified with 2,4-dinitrophenylhydrazine were prepared and used as adsorbents in membrane-protected solid-phase microextraction (μ-SPE) to extract aldehydes from different meat samples during thermal processing. Fourier transform infrared spectroscopy indicated the successful modification of sulfonic acid groups on the surface of PS microspheres. Under the optimized adsorption and analytical conditions, aldehydes can be effectively extracted from meat samples with excellent regression linearities (0.9921–0.9993), extremely low limits of detection (0.010–0.621 ng g−1), 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.