This European Standard specifies a gas chromatographic method with electron capture detection (ECD) for the determination of organochlorine pesticides (OC""s) and polychlorinated biphenyls (PCBs) in animal feeding stuffs.The method is applicable to animal feeding stuffs with a water content up to about 20 wt% and oil/fatty samples containing residues of one or more of the following OC""s, PCBs, toxaphene and some of their isomers and degradation products:- Aldrin;- Dieldrin;- Chlorocamphene (Toxaphene);- Chlordane (= sum of Chlordane isomers and Oxychlordane);- DDT (= sum of isomers op'-DDT, pp'-DDT, pp'-TDE (pp'-DDD), and pp'-DDE);- Endosulfan (sum of µ¡-/