Abstract: In this work, a highly selective molecular imprinted polymer (SBA-15@MIP) was prepared using dicyandiamide (DCD) as the template molecule and mesoporous silica SBA-15 as the carrier. The resulting polymers were characterized by scanning electron microscopy and FT-IR spectra. A highly ordered mesoporous nanostructure was observed for the fabricated polymer. The performance tests showed that the adsorption capacity of SBA-15@MIP for DCD was higher than those of non-imprinted mesoporous silica polymer (SBA-15@NIP) and SBA-15. SBA-15@MIP was successfully used as the solid-phase extraction (SPE) sorbent coupled with HPLC for trace DCD determination in bovine milk and milk powder. Under selected conditions, a favorable linearity between 1 μg/mL and 100 μg/mL was obtained and the detection limit was estimated to be 0.08 μg/mL (bovine milk) and 0.10 μg/mL (milk powder). These results indicated that SBA-15@MIP could be used as an efficient SPE adsorbent for enrichment of DCD in bovine milk and milk powder
Template and target information: dicyandiamide, DCD
Author keywords: surface molecular imprinting, SBA-15, Dicyandiamide, Solid-phase extraction, Bovine milk powder