Organophosphorus pesticide residues in Mexican commercial pasteurized milk.
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.
Salas
José Humberto
JH
Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana-X. Calz. Del Hueso 1100. Col. Villa Quietud, C.P. 04960, México, D.F., Mexico.
González
María Magdalena
MM
Noa
Mario
M
Pérez
Norma Alicia
NA
Díaz
Gilberto
G
Gutiérrez
Rey
R
Zazueta
Héctor
H
Osuna
Isidro
I
D000818:Animals; D002417:Cattle; D002709:Chlorfenvinphos / Q000032:analysis; D004390:Chlorpyrifos / Q000032:analysis; D002849:Chromatography, Gas; D004006:Dichlorvos / Q000032:analysis; D007306:Insecticides / Q000032:analysis*; D008452:Maximum Allowable Concentration; D008800:Mexico; D008892:Milk / Q000737:chemistry*; D010573:Pesticide Residues / Q000032:analysis*; D010702:Phorate / Q000032:analysis; D012680:Sensitivity and Specificity
D007306:Insecticides; D010573:Pesticide Residues; D010702:Phorate; D004006:Dichlorvos; D002709:Chlorfenvinphos; D004390:Chlorpyrifos