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The comparison of extraction with or without QuEChERS procedure. (a) MRL 60 μg/kg; (b) MRL 500 μg/kg. The I0 and IX0 were the inhibition values of solvent and matrix at 0.5 ng/mL, respectively; the B0 and BX0 were the values of blank solvent and blank matrix, respectively. The ratio was the value of BX0/ B0 or IX0/I0.
