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Hollow porous ionic liquids composite polymers based solid phase extraction coupled online with high performance liquid chromatography for selective analysis of hydrophilic hydroxybenzoic acids from complex samples

Solvent ExtractionChemical EngineeringEngineeringSeparation ScienceHydrophilic Hydroxybenzoic AcidsPolymer ScienceIonic ConductorAnalytical ChemistryLiquid ChromatographyChemistryChromatographic AnalysisComplex SamplesPolymer ChemistryChromatographySolid Phase Extraction