This Technical Report lists 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 LC-MS/MS, such as the standards in preparation:prEN 15637 """"Foods of plant origin - Determination of pesticide residues using LC-MS/MS following methanol extraction and clean up using diatomaceous earth""""prEN 15662 """"Foods of plant origin - Determination of pesticide residues using GC-MS and/or LC-MS/MS following acetonitrile extraction/partitioning by dispersive SPE - QuEChERS-method""To facilitate the determination of active substances and/or metabolites usi