This document specifies a gas chromatographic method with electron capture detection (ECD) for the determination of organochlorine pesticides (OCP??s) in animal feeding stuffs. The method is applicable to animal feeding stuffs with a water content up to about 20 % by weight and oil/fatty samples containing residues of one or more of the following OCP??s@ toxaphene and some of their isomers and degradation products: ?? aldrin; ?? dieldrin; ?? chlordane (as the sum of chlordane isomers and oxychlordane); ?? dichlorodiphenyltrichloroethane (DDT) (as the sum of isomers op'-DDT@ pp'-DDT@ pp'-TDE (pp'- DDD)@ and pp'-DDE); ?? endosulfan (as the sum of ??-/??isomers and endosulfan-sulphate); ?? endrin (sum of endrin and delta-keto-endrin); ?? heptachlor (as the sum of heptachlor and heptachlor epoxide); ?? hexachlorobenzene (HCB); ?? hexachlorocyclohexane isomers ??-HCH (??-BHC)@ ??HCH (??BHC)@ ??HCH (??BHC or lindane); ?? photo heptachlor; ?? cis- and trans-nonachlor; A limit of quantification (LOQ) for the mentioned OCPs of 5 ng/g is intended to be obtained. However@ 10 ng/g applies for heptachlor@ aldrin@ endrin@ dieldrin@ and endosulfan (??-/?¨C and sulphate). Individual laboratories are responsible for ensuring that the equipment that they use@ achieves these limits of quantifications. The LOQs apply to the individual OCPs.