This document specifies the determination of free melamine in coated and uncoated wood-based-panels. NOTE 1 It is also applicable to other wood-based products, to other solid products e.g. impregnates or decorative paper and to liquid products (e.g. adhesives). The determination of melamine is performed by extraction in dimethyl sulfoxide (DMSO) and subsequent high-performance chromatography (HPLC) analysis and ultraviolet (UV) detection. NOTE 2 For determination of melamine in foodstuff EN 16858 is applicable. For determination of melamine in animal feeding stuffs EN 17212 is applicable. For determination of melamine in textiles EN ISO 1833-26 is applicable.