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A novel magnetic solid phase material based on a micro–meso porous activated carbon/Fe 3 O 4  nanocomposite was used to extract caffeine from surface water samples. The method is efficient and rapid, and has minimum solvent consumption.

rsc advances

Magnetic solid-phase extraction of caffeine from surface water samples with a micro–meso porous activated carbon/Fe<sub>3</sub>O<sub>4</sub> nanocomposite prior to its determination by GC-MS

Magnetic solid-phase extraction of caffeine from surface water samples with a micro–meso porous activated carbon/Fe3O4 nanocomposite prior to its determination by GC-MS

Magnetic solid-phase extraction of caffeine from surface water samples with a micro–meso porous activated carbon/Fe₃O₄ nanocomposite prior to its determination by GC-MS