ISO 13904:2016

Animal feeding stuffs — Determination of tryptophan content

Publication date: Feb 11, 2016

General information

Current stage: 90.60 Effective date: Jun 5, 2021

Originator: ISO

Owner: ISO/TC 34/SC 10

Type: International Standard

ICS: 65.120

Languages: English French

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Status: Published

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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

Revises
ISO 13904:2005

NOW

PUBLISHED
ISO 13904:2016
90.60 Close of review
Jun 5, 2021

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