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ISO 13904:2016

Animal feeding stuffs — Determination of tryptophan content

Publication date:   Feb 11, 2016

General information

90.93 Standard confirmed   Oct 31, 2022

ISO

ISO/TC 34/SC 10 Animal feeding stuffs

International Standard

65.120   Animal feeding stuffs

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 13904:2005

NOW

PUBLISHED
ISO 13904:2016
90.93 Standard confirmed
Oct 31, 2022