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  • Title: Organophosphorus pesticide residues in Mexican commercial pasteurized milk.
    Author: Salas JH, González MM, Noa M, Pérez NA, Díaz G, Gutiérrez R, Zazueta H, Osuna I.
    Journal: J Agric Food Chem; 2003 Jul 16; 51(15):4468-71. PubMed ID: 12848527.
    Abstract:
    A study was conducted to measure residues of 13 organophosphorus (OP) pesticides, widely used as dairy cattle ectoparasiticides or in crops used for animal feed, in homogenized and pasteurized Mexican milk samples. Four different milk brands with high distribution were collected biweekly during a 12 month period (n = 96) in supermarkets. OP pesticide residues were measured by gas chromatography with a flame photometric detector. Approximately 39.6% of the samples contained detectable levels of OP pesticide residues. Eight samples contained residues exceeding established maximum residue limits (MRL), and the OP pesticides present in these samples were dichlorvos (five samples), phorate, chlorpyrifos, and chlorfenvinphos (one sample, respectively). Average residues of 13 OP pesticides measured were below established MRLs ranging between 0.0051 and 0.0203 ppm.
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