This European Standard gives general considerations for the determination of pesticide residues in foods of plant origin.Each method specified in this European Standard is suitable for identifying and quantifying a definite range of those organohalogen, and/or organophosphorus and/or organonitrogen pesticides which occur as residues in foodstuffs of plant origin.This European Standard contains the following methods that have been subjected to interlaboratory studies and/or are adopted throughout Europe:- method L: Extraction with acetone, liquid liquid partition with dichloromethane and clean-up on a silica-gel/charcoal column [1];- method M: Extraction wit