ABSTRACT
Pesticide residues can be present in fruits and vegetables as a consequence of the use of protection plan products (PPPs) in the field to avoid pest and diseases or to improve the productivity. Since discovery of the first compounds of the second-generation pesticides in the 1940s, composed of synthetic organic compounds, people started to be aware of pesticide residues and its potential health risk. Selectivity can be even higher in accurate mass spectrometry (MS) when full-scan MS is combined with MS/MS. Resolving power of time of flight (TOF) mass spectrometer depends on the length of flight path. Mass resolution is crucial to avoid false negative results. When resolution of the instrument is not sufficient, ions of analyte and co-extracted matrix interference appear in the mass spectrum as one peak with the apex between exact masses of analyte and matrix compound.
