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Comparison of the pigment-cleanup effects between Sin-QuEChERS nano and d-SPE methods. (a) Extract of lettuce (1) without cleanup, (2) cleaned-up by d-SPE and (3) cleaned-up by Sin-QuEChERS nano. (b) Extract of Chinese chives (1) without cleanup, (2) cleaned-up by d-SPE and (3) cleaned-up by Sin-QuEChERS nano.
