title: Polychlorinated biphenyls (PCBs) residues in milk from an agroindustrial zone of Tuxpan, Veracruz, Mexico.
abstract: The coasts of the Gulf of Mexico are zones exposed to the exploration and exploitation of petroleum sources, and the products generated in agricultural zones may become contaminated by persistent organic pollutants (POPs). The objective of the present study was to evaluate the presence of polychlorinated biphenyl compounds (PCBs) in milk from dairy production units near sources of environmental pollutants. It was confirmed that the seven congeners of nondioxin-like PCBs (NDL-PCBs) are present in milk where compounds PCB101, PCB118, PCB153 and PCB180 appear in 100% of the samples analyzed, the rank of concentration for the sum of the seven congeners fluctuating between 2.6 and 26 ng g(-1) with a median of 6 ng g(-1). None of the samples surpassed the provisional value established by the EU of 40 ng g(-1) of milk fat for the sum of the seven congeners, indicator that was not affected by the season of the year (p<0.05), whose median of 8.6 ng g(-1) and 6.3 ng g(-1) for rain and drought respectively. The concentrations of NDL-PCBs found in milk do not represent a problem for human health; however, they alert the existence of spontaneously generated, uncontrolled sources that may represent a potential danger for human and animal health.
authors: Doctorado en Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana Unidad Xochimilco, México, DF, Mexico.
authors: J Jesús
authors: JJ
authors: Pérez
authors: Salvador Vega Y
authors: SV
authors: León
authors: Rey
authors: R
authors: Gutiérrez
authors: Yanet
authors: Y
authors: López
authors: Roberto
authors: R
authors: Faure
authors: Arturo
authors: A
authors: Escobar
mesh_terms: D000818:Animals; D002417:Cattle; D002849:Chromatography, Gas; D004781:Environmental Exposure; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000032:analysis*; D006801:Humans; D008800:Mexico; D008892:Milk / Q000737:chemistry; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D012621:Seasons
chemical_list: D004785:Environmental Pollutants; D011078:Polychlorinated Biphenyls