Reference number
ISO 5983-2:2009
© ISO 2024
International Standard
ISO 5983-2:2009
Animal feeding stuffs — Determination of nitrogen content and calculation of crude protein content — Part 2: Block digestion and steam distillation method
Edition 2
2009-06
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Published (Edition 2, 2009)
This publication was last reviewed and confirmed in 2019. Therefore this version remains current.

ISO 5983-2:2009

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Format
CHF 96
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Abstract

ISO 5983-2:2009 specifies a method for the determination of nitrogen content of animal feeding stuffs according to the Kjeldahl method, and a method for the calculation of the crude protein content.

It is suitable for use as a semi-micro rapid routine method using block digestion, copper catalyst, and steam distillation into boric acid.

The method is applicable to the determination of greater than 0,5 % mass fraction Kjeldahl nitrogen in animal feeding stuffs, pet foods, and their raw materials.

The method does not measure oxidized forms of nitrogen nor heterocyclic nitrogen compounds.

The method does not distinguish between protein nitrogen and non-protein nitrogen.

General information

  • Status
     : Published
    Publication date
     : 2009-06
    Stage
    : International Standard under systematic review [90.20]
  • Edition
     : 2
    Number of pages
     : 15
  • Technical Committee :
    ISO/TC 34/SC 10
    ICS :
    65.120 
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