Variability of matrix effects in liquid and gas chromatography-mass spectrometry analysis of pesticide residues after QuEChERS sample preparation of different food crops

► Useful to those using LC-MS and GC-MS for quantitation in complex samples. ► Particularly useful for pesticide residue analysis in regulatory and other applications. ► Like no other study before it, matrix effects in both LC-MS and GC-MS assessed. ► Studies effects within and among common representative analytes and commodities. ► Matrix-matching is rather consistent from one sample to another of the same matrix.