NF EN ISO 13904

NF EN ISO 13904

April 2016
Standard Current

Animal feeding stuffs - Determination of tryptophan content

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.

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Main informations

Collections

National standards and national normative documents

Publication date

April 2016

Number of pages

20 p.

Reference

NF EN ISO 13904

ICS Codes

65.120   Animal feeding stuffs

Classification index

V18-114

Print number

1

International kinship

ISO 13904:2016

European kinship

EN ISO 13904:2016
Sumary
Animal feeding stuffs - Determination of tryptophan content

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.

Replaced standards (1)
NF EN ISO 13904
October 2005
Standard Cancelled
Animal feeding stuffs - Determination of tryptophan content

Le présent document décrit la détermination de la teneur en tryptophane total et libre dans les aliments des animaux. Il ne fait pas de distinction entre la forme D- et la forme L-.

Table of contents
  • 1 Domaine d'application
  • 2 Principe
  • 3 Réactifs et matériaux
  • 4 Appareillage
  • 5 Mode opératoire
  • 6 Calcul des résultats
  • 7 Fidélité
  • 8 Rapport d'essai
  • Annexe A Résultats d'un essai interlaboratoires
  • Annexe B Observations sur la méthode
  • Annexe C Préparation des échantillons: Exemples portant sur des analyses dans des produits purs et des prémélanges
  • Annexe D Résultats d'un essai interlaboratoires portant sur le tryptophane dans les produits purs et les prémélanges contenant plus de 2 pourcent de tryptophane
  • Bibliographie
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