Abstract
A strong cation exchanger based on silicone polymer-coated silica (PC-SCX) was synthesized by the following three-step procedure: (1) coating porous silica with a silicone polymer; (2) introduction of epoxy groups with allyl glycidyl ether; (3) introduction of sulfonic groups with sulfanilic acid. The surface structure of PC-SCX was characterized by solid-state 13C-nuclear magnetic resonance spectrometry (NMR) and elemental analysis. In comparison with conventional silica-based cation exchanger, PC-SCX showed an improved durability and a better reproducibility in different synthetic batches. PC-SCX was applied to separation of several different classes of standard cationic compounds, such as biogenic amines, water-soluble vitamins and an antibacterial agent.
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