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Comparison of the extraction efficiencies of the five mycotoxins by the four candidate extraction solvents (a) and purification efficiencies by three different clean-up cartridges (b) using blank formula feed samples spiked with 50 μg/kg of each mycotoxin. The error bar represents standard deviation (n = 3) and acceptable recoveries are in the range of two dashed lines (70%–120%).
