EN20的这一部分规定了一种方法，用于确定木材防腐剂对通过完全浸渍过程进行过处理的木材中的黄柏（Stephens）侵染的保护作用或毒性值。该方法适用于: - 作为杀虫剂研究的水不溶性化学物质，或; - 通过稀释浓缩物在实验室中提供或准备的有机配方

This part of EN 20 specifies a method for the determination of the protective effectiveness or the toxic values of a wood preservative against infestation by Lyctus brunneus (Stephens) in wood which has been treated previously by full impregnation. This method is applicable to: - water-insoluble chemicals which are being studied as acitve insecticides, or; - organic formulations, as supplied or as prepared in the laboratory by dilution of concentrates.