Figure 3.

MRM-chromatograms of a solvent blank (A), non-spiked pooled matrix from Austria, demonstrating the extremely high sensitivity of the established method, as this sample was considered a “blank” sample before (B) and spiked pooled matrix from Austria (C) of beauvericin (BEA), enniatin B (Enn B), enniatin B₁ (Enn B₁), alternariol monomethyl ether (AME), ochratoxin A (OTA) and zearalenone (ZEN), respectively. For OTA and ZEN ¹³C-labeled internal reference standards were included for analyte confirmation, while for the other analytes detected no labeled standards were available (To discriminate between quantifier and qualifier ion traces kindly refer to the online version of this figure).