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The magnetic mesoporous polymelamine\u2010formaldehyde composites combined both the properties of mesoporous polymelamine\u2010formaldehyde and the magnetism of NH<jats:sub>2<\/jats:sub>\u2010SiO<jats:sub>2<\/jats:sub>@Fe<jats:sub>3<\/jats:sub>O<jats:sub>4<\/jats:sub> nanoparticles, possessing high specific surface area (150.66 m<jats:sup>2<\/jats:sup> g<jats:sup>\u20131<\/jats:sup>) and good magnetism (24.50 emu g<jats:sup>\u20131<\/jats:sup>). The magnetic mesoporous polymelamine\u2010formaldehyde composites were employed as magnetic adsorbent for the extraction of sulfonamides. Under optimal conditions, good linearities with correlation coefficients higher than 0.9984 were obtained between peak area and sulfonamides concentration (2\u2013200 \u03bcg L<jats:sup>\u20131<\/jats:sup>) with limits of detection in the range of 0.33\u20130.58 \u03bcg L<jats:sup>\u20131<\/jats:sup>. The established method was successfully applied for the determination of sulfonamides in egg and milk samples. The adsorption mechanisms demonstrated that the adsorption of magnetic mesoporous polymelamine\u2010formaldehyde composites toward sulfonamides was a multilayer process, and adsorption kinetics followed the pseudo\u2010second\u2010order model.<\/jats:p>","DOI":"10.1002\/jssc.202100591","type":"journal-article","created":{"date-parts":[[2021,10,23]],"date-time":"2021-10-23T09:21:04Z","timestamp":1634980864000},"page":"4402-4411","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Determination of sulfonamides in milk and egg samples by HPLC with mesoporous polymelamine\u2010formaldehyde as magnetic solid\u2010phase extraction adsorbent"],"prefix":"10.1002","volume":"44","author":[{"given":"Wanliang","family":"Liao","sequence":"first","affiliation":[{"name":"College of Chemistry and Life Sciences Zhejiang Normal University  Jinhua P. R. 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