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LC-MS/MS chromatograms obtained in negative ion mode (a,b) and in positive ion mode (c) of a naturally urine sample (#4) containing 11.33 ng/mL of DON, 0.108 ng/mL of β-ZOL, 0.123 ng/mL of α-ZOL, 0.082 ng/mL of ZEA, 0.26 ng/mL of FB1 and 0.06 ng/mL of OTA.
