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<p> In the study, 1,4-phenylene diisocyanate (PPDI) as a neutral linking monomer is applied as direct synthesis of sulfonated covalent organic polymers (COPs) with 2,5-diaminobenzenesulfonic acid (DBS) under moderate and economic circumstances, and the Fe<sub>3</sub>O<sub>4</sub> nanoparticles were further decorated on the surface of COPs. The prepared PPDI-DBS@Fe<sub>3</sub>O<sub>4</sub> with abundant active sulfonic acid groups showed good adsorption performance for <i>β</i>-agonists. The PPDI-DBS@Fe<sub>3</sub>O<sub>4</sub> was applied in magnetic solid-phase extraction (MSPE) for the enrichment and purification of <i>β</i>-agonists. Combined with liquid chromatography–tandem mass spectrometry, the proposed method showed low detection limits of 0.03–0.05&#xa0;µg&#xa0;kg<sup>−1</sup> in food samples. The spiked recoveries were 93.5%–102.3% with the relative standard deviations of 2.6%–5.0%.</p>

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Synthesis of Magnetic Sulfonated Covalent Organic Polymers for Rapid Extraction of β-Agonists in Food Samples

  • 期刊论文

  • 发表日期：

    2026年1月31日

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  • Qie Gen Liao,
  • Li Juan Yuan,
  • Jian Jun Xiang,
  • Da Wen Zhang

摘要

In the study, 1,4-phenylene diisocyanate (PPDI) as a neutral linking monomer is applied as direct synthesis of sulfonated covalent organic polymers (COPs) with 2,5-diaminobenzenesulfonic acid (DBS) under moderate and economic circumstances, and the Fe3O4 nanoparticles were further decorated on the surface of COPs. The prepared PPDI-DBS@Fe3O4 with abundant active sulfonic acid groups showed good adsorption performance for β-agonists. The PPDI-DBS@Fe3O4 was applied in magnetic solid-phase extraction (MSPE) for the enrichment and purification of β-agonists. Combined with liquid chromatography–tandem mass spectrometry, the proposed method showed low detection limits of 0.03–0.05 µg kg−1 in food samples. The spiked recoveries were 93.5%–102.3% with the relative standard deviations of 2.6%–5.0%.