Facile preparation of polydopamine‐coated imprinted polymers on the surface of SiO₂ for estrone capture in milk samples

Abstract

Estrone molecularly imprinted polymers were synthesized through the self-polymerization of dopamine on the surface of silica gels, which had the characteristics of mild polymerization conditions, simple reaction procedure and good specific recognition ability for estrone. The estrone molecularly imprinted polymers were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, elemental analysis and nitrogen adsorption-desorption tests. The characterization confirmed that the imprinted polymers were successfully grafted on the surface of silica gels. Through investigating the adsorption performance, the prepared estrone molecularly imprinted polymers exhibited high adsorption capacity, fast mass transfer, as well as excellent selectivity toward estrone. The estrone molecularly imprinted polymers as the solid-phase extraction adsorbent coupled with high-performance liquid chromatography was developed to determine estrone from the milk samples. The developed estrone molecularly imprinted polymer solid-phase extraction with high-performance liquid chromatography method exhibited satisfactory specificity, precision, accuracy and good linearity relationship in the range of 0.2-20 μg/mL. The developed method is simple, fast, effective and high specificity method and it provides a new method to detect the residues of estrone in animal foods.

Photoirradiation surface molecularly imprinted polymers for the separation of 6‐O‐α‐d‐maltosyl‐β‐cyclodextrin

“…Likewise, Zheng et al. observed that the silica gels showed a fairly smooth surface, and it was quite different from the surface of estrone molecularly imprinted polymers that had rough surfaces . TEM images (Fig.…”

“…Compared to functionalized silica particles, PSMIPs have a rough surface; this could be attributed to the polymerization process producing imprinted recognition sites on the surface of functionalized silica particles [30]. Likewise, Zheng et al observed that the silica gels showed a fairly smooth surface, and it was quite different from the surface of estrone molecularly imprinted polymers that had rough surfaces [31]. TEM images ( Fig.…”

Facile preparation of magnetic molecularly imprinted polymers for the selective extraction and determination of dexamethasone in skincare cosmetics using HPLC

“…The calculated SC values for prednisolone acetate, estrone, diethylstilbestrol, and estradiol were 1.36, 1.44, 1.94, and 1.88, respectively. The difference suggested that the high selectivity was attributed to the complementary shape, size, spatial distribution, and molecular interactions of imprinting sites in MIPs cavities [25,35].…”

An Account on the Versatility of Dopamine as a Functional Monomer in Molecular Imprinting

“…In one work, Estrone, a steroid hormone responsible for organism maturation and feed additive for animal growth and lactation, was imprinted with DA for 12 h over silica gels. The resulted MIP was used successfully with linearity relationship in the range of 0.2–20 μg/mL in SPE–HPLC for estrone analysis in milk samples …”