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Solid-phase extraction of phospholipids using mesoporous silica nanoparticles: application to human milk samples.

In this study, mesoporous silica materials (MSMs) with bimodal pore systems (namely, UVM-7), MCM-41 silica, and a commercial silica-based material were evaluated as solid-phase extraction (SPE) sorbents for the isolation of phospholipids (PLs) using phosphatidylcholine as a test compound. Morphological characterization (including TEM, surface, and size pore measurements) of these materials was carried out. The mechanism of interaction of the target analyte with the MSMs was also studied. With regard to the SPE process, several experimental parameters that affect the extraction performance (e.g., loading and elution solvent, breakthrough volume, loading capacity, and reusability) were investigated. The recommended protocol was applied to the extraction of PLs in human milk fat samples. The extracted PLs were then determined by hydrophilic interaction liquid chromatography (HILIC) using evaporative light scattering detection (ELSD). This work reports the first application of silica-based mesoporous materials to preconcentrate PLs in these complex matrices. Graphical abstract ᅟ.

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