This Technical Report lists the mass spectrometric parameters which are useful for the application of European Standards for the determination of pesticide residues in foods of plant origin that use GC-MS. These European Standards are as follows: EN 1528 (all parts), Fatty food - Determination of pesticides and polychlorinated biphenyls (PCBs) EN 12393 (all parts), Foods of plant origin - Multiresidue methods for the gas chromatographic determination of pesticide residues EN 15662, Foods of plant origin - Determination of pesticide residues using GC-MS and/or LC-MS/MS following acetonitrile extraction/partitioning - QuEChERS-method To facilitate the determination of pesticides and/or metabolites using GC-MS/MS, Table 2 specifies the diagnostic ion transitions suitable for identification and quantification, which can be used.