Preparation of Cerium Dioxide Functionalized Magnetic Layered Double Hydroxides for High-efficiency Phosphopeptide Enrichment
Dandan Jiang , Ruixue Qi , Siqi Lyu , Wei Wang , Jinghai Liu , Qiong Jia
Chemical Research in Chinese Universities ›› 2023, Vol. 39 ›› Issue (2) : 253 -259.
Preparation of Cerium Dioxide Functionalized Magnetic Layered Double Hydroxides for High-efficiency Phosphopeptide Enrichment
In this work, we prepared a material with magnetic nanoparticles (Fe3O4) as core, layered double hydroxides(LDHs) as affinity shell, and cerium dioxide(CeO2) as functional molecules(denoted as Fe3O4@LDH-CeO2). On the basis of combined immobilized metal ion affinity chromatography(IMAC) and metal oxide affinity chromatography(MOAC), Fe3O4@LDH-CeO2 was used to enrich phosphopeptides with high efficiency. The material exhibited high selectivity(α-casein:β-casein:BSA=1:1:5000, mass ratio), high recovery(95.87%), and good reusability of 10 times adsorption-desorption experiments. The feasibility of Fe3O4@LDH-CeO2 was further investigated by extracting phosphopeptides from biological samples(nonfat milk, serum, saliva, and A549 cell lysate).
Layered double hydroxide / Cerium dioxide / Magnetic / Phosphopeptide enrichment
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