标准摘要
[中文适用范围]： 本国际标准规定了一种测定动物饲料（如全价和辅助饲料、补充饲料、原料、成分和浓缩物）中的总色氨酸和游离色氨酸含量的方法。对于商业纯物质和含有超过2%色氨酸的混合物，该方法还用于测定游离色氨酸。此标准未区分D-型和L-型色氨酸。 [外文原描述]： ISO 13904:2016 specifies a method for determination of the total and free tryptophan (Trp) content in feeding stuffs (e.g. complete and complementary feeds, supplementary feeds, raw materials, ingredients, and concentrates) and determination of free tryptophan in commercial pure substances and premixtures containing more than 2 % of tryptophan. It does not distinguish between D- and L-forms.
英文名称Animal feeding stuffs — Determination of tryptophan content