Reference number
ISO 13904:2016
© ISO 2025
International Standard
ISO 13904:2016
Animal feeding stuffs — Determination of tryptophan content
Edition 2
2016-02
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Published (Edition 2, 2016)
This publication was last reviewed and confirmed in 2022. Therefore this version remains current.

ISO 13904:2016

Language
Format
CHF 98
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Abstract

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.

General information

  • Status
     : Published
    Publication date
     : 2016-02
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 2
    Number of pages
     : 14
  • Technical Committee :
    ISO/TC 34/SC 10
    ICS :
    65.120 
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