Food Testing and Agriculture
This application note describes the quantitative analysis of 19 of the 40 regulated pesticides with maximum residue limits (MRLs) established by the Brazilian Health Surveillance Agency (ANVISA). We also analyzed nine pesticides found in mango during the monitoring programs developed in the Pesticide Residues Laboratory (LRP/IB)/São Paulo State and by governmental programs. The samples were also analyzed with a qualitative multiresidue method for 258 pesticides, extending the analytical scope to analytes with low probability of being present, as recommended in SANCO/12571/2013 guidelines . The extraction was performed using an Agilent Bond Elut QuEChERS EN kit. Target pesticides were analyzed by GC/MS/MS using an Agilent 7890A GC and an Agilent 7000B Triple Quadrupole GC/MS in a constant pressure/postcolumn backflush configuration (Pesticide Analyzer 411). The method was validated in terms of recovery and reproducibility. The limits of detection (LOD) ranged between 0.0006 and 0.0607 mg/kg and limits of quantitation (LOQ) were between 0.0025 and 0.5 mg/kg. LOQs were established as ¼ of MRL. Recoveries for all compounds were 70 to 120%, and RSDs were below 20% for five replicates. LODs were calculated as three times the RSDs at LOQ levels.
Publication number: 5591-5905EN.pdf
Publication Date: July 8, 2015