标准编号：ISO 13904:2016
中文名称：动物饲养材料 色氨酸含量的测定
英文名称：Animal feeding stuffs — Determination of tryptophan content
发布日期：2016-02
标准范围
This International Standard 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.
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