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The purification chromatograms of green tea extracts with two materials (Fe3O4/MIPs, and DES-7-Fe3O4/MIPs) by M-SPE. (Column: C18 column, mobile phase: methanol-water-acetic acid (20/80/2, v/v/v), flow rate: 0.8 mL·min−1, UV: 280 nm, injection: 10 μL).
