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Chromatograms (SIM mode) obtained for injection of blank (solid line) and fortified (dotted line) samples of (A) papaya and (B) avocado for checking matrix interferences. Pesticide concentration was 8 mg/L. AME = ametryn; ATZ = atrazine; CAR = carbaryl; CF = carbofuran; MeP = methyl parathion; SIM = selected ion monitoring.
