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. 2019 May 8;9(25):14247–14253. doi: 10.1039/c9ra01879d

Fig. 5. (A) HPLC separation chromatographs of ten sulfonamides residues with various concentrations; (B) assessment of the reusability of the developed magnetic COFs adsorbents for SPE preconcentration and determination of target sulfonamides residues.

Fig. 5