Magnetic dummy-template molecularly imprinted polymers as selective sorbents for geosmin enrichment from water samples.

Authors

Miaomiao Yu, Lirong Li, Yufeng Wu, Sai Wang, Naili Wang, Xueqiang Lu

Published in

RSC advances. Jul 29, 2026. Epub Jul 29, 2026.

Abstract

In the present work, core-shell Fe₃O₄@SiO₂@DMIPs were prepared using a dummy-template imprinting strategy and applied as extraction sorbents for the selective enrichment of geosmin (GSM) from water samples. The resulting Fe₃O₄@SiO₂@DMIPs showed an adsorption capacity of 6.85 mg g^-1, reached adsorption equilibrium within 75 min, and could be magnetically separated within 30 s. Compared with the corresponding non-imprinted polymers, the imprinted sorbents showed enhanced adsorption toward GSM and preferential recognition of GSM over 2-methylisoborneol. After six adsorption-desorption cycles, the adsorption performance decreased by only 9.36%, indicating acceptable reusability. When applied to magnetic dispersive solid-phase extraction coupled with GC-MS, the Fe₃O₄@SiO₂@DMIPs achieved recoveries of 83.1-90.2% for spiked water samples, with relative standard deviations lower than 7.4%, and provided limits of detection and quantitation of 0.034 and 0.115 mg L^-1, respectively. These results suggest that Fe₃O₄@SiO₂@DMIPs could be used as selective pretreatment sorbents for GSM enrichment and may provide a useful reference for developing imprinting-based extraction materials.

PMID:
42529680
Bibliographic data and abstract were imported from PubMed on 30 Jul 2026.

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