Castilla Pinedo, YolandaMercado Martínez, Iván DaríoGonzález Silva, Germán2013-04-012013-04-0120121909-0455http://hdl.handle.net/10567/838Introduction. Contamination due to organochlorine pesticides on food is considered as a serious threat for human health, given their high toxicity, bioaccumulation and persistence. Cow milk is used as an indicator of the persistence of these pesticides in the environment, because of the milk´s importance and, in general, of the role of dairy products, especially for children. This has been a reason to study pasteurized milk from Colombia and compare the results with previous research works in other countries. Objective. To determine the remains of organochlorine pesticides contained in liquid pasteurized milk sold by stores located near to pasteurization plants in Cartagena. Materials and methods. 24 bags of milk, from randomly chosen commercial brands and daily provided, were analyzed. The analytic technique of gas chromatography with detector of micro electrons capture was used to determine the content of organochlorine insecticides. Results. For this research work the remains of α-chlordane (0,90 mg/kg), β-chlordane (0,12 mg/kg), endosulfan I (0,04 mg/kg), endosulfan II (0,001 mg/kg), endosulfansulphate (0,002 mg/kg), p,p’-DDT (not detected) p,p’-DDE (0,01 mg/kg), p,p’-DDD (0,01 mg/kg), endrin (0,027 mg/kg), endrinketone (0,042 mg/kg) and endrin aldehyde (0,009 mg/kg) were determined. Conclusion. The research work concluded that some concentrations of the pesticides analyzed were high when their values were compared to those recommended by FAO/WHO in their maximum residual levels (MRL).esCorporación Universitaria LasallistaÁrea Metropolitana del Valle de AburráLechePesticidasContaminación ambientalContaminaciónLeche - AnálisisLeche - CalidadLeche - Control de calidadLeche - ContaminaciónArticle