title: Organochlorine pesticide distribution in an organic production system for cow's milk in Chiapas, Mexico.
abstract: The objective of this study was to evaluate the presence of organochlorine pesticides in samples of forage, soil, water, and milk in four units of an organic production system for cow´s milk (samples of forage, milk, soil, and water) in Tecpatan, Chiapas, Mexico. The organochlorine pesticides were extracted from forage, soil and water based on the USEPA (2005) guideline and from milk based on the IDF 1991 guideline. The pesticides were identified and quantified by gas chromatography with electron capture detector (CG-ECD). In general, the highest average concentration of total pesticides was found in the samples of milk and forage (311 ± 328 and 116.5 ±77 ng g(-1) respectively). Although, the production systems analyzed are organic, organochlorine pesticides were detected in all environmental samples (forage, soil, water, and organic milk). Although no values surpassed the defined limits of Mexican and International regulation it is advisable that a monitoring program of contaminants in these production systems is continued.
authors.affiliation: a Department of Agricultural and Animal Production of the Autonomous Metropolitan University , Xochimilco . D.F. , Mexico.
authors.forename: María N
authors.initials: MN
authors.lastname: Murga
authors.affiliation: a Department of Agricultural and Animal Production of the Autonomous Metropolitan University , Xochimilco . D.F. , Mexico.
authors.forename: Rey
authors.initials: R
authors.lastname: Gutiérrez
authors.affiliation: a Department of Agricultural and Animal Production of the Autonomous Metropolitan University , Xochimilco . D.F. , Mexico.
authors.forename: Salvador
authors.initials: S
authors.lastname: Vega
authors.affiliation: a Department of Agricultural and Animal Production of the Autonomous Metropolitan University , Xochimilco . D.F. , Mexico.
authors.forename: José J
authors.initials: JJ
authors.lastname: Pérez
authors.affiliation: a Department of Agricultural and Animal Production of the Autonomous Metropolitan University , Xochimilco . D.F. , Mexico.
authors.forename: Rutilio
authors.initials: R
authors.lastname: Ortiz
authors.affiliation: a Department of Agricultural and Animal Production of the Autonomous Metropolitan University , Xochimilco . D.F. , Mexico.
authors.forename: Beatriz
authors.initials: B
authors.lastname: Schettino
authors.affiliation: b Faculty of Veterinary Medicine and Animal Husbandry of the National Autonomous University of Chiapas , Tuxtla Gutiérrez , Chiapas , México.
authors.forename: Alberto
authors.initials: A
authors.lastname: Yamasaki
authors.affiliation: b Faculty of Veterinary Medicine and Animal Husbandry of the National Autonomous University of Chiapas , Tuxtla Gutiérrez , Chiapas , México.
authors.forename: Jorge L
authors.initials: JL
authors.lastname: Ruíz
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000818:Animals; D002417:Cattle; D002849:Chromatography, Gas; D004784:Environmental Monitoring / Q000379:methods; D005506:Food Contamination / Q000032:analysis*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D008800:Mexico; D008892:Milk / Q000737:chemistry*; D058871:Organic Agriculture; D010573:Pesticide Residues / Q000032:analysis; D010575:Pesticides / Q000032:analysis*; D012987:Soil / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D006843:Hydrocarbons, Chlorinated; D010573:Pesticide Residues; D010575:Pesticides; D012987:Soil; D014867:Water
keywords: Chiapas; Organochlorine compounds; environment; organic production