BS EN ISO 13904:2005

Animal feeding stuffs. Determination of tryptophan content. | Status: Revised, Superseded, Withdrawn

1 Scope This International Standard describes determination of the total and free tryptophan content in feeding stuffs (e.g. complete and complementary feeds, supplementary feeds, raw materials, ingredients, premixtures and concentrates). It does not distinguish between D- and L-forms.