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    I.S. EN ISO 5983-2:2009

    Current The latest, up-to-date edition.

    ANIMAL FEEDING STUFFS - DETERMINATION OF NITROGEN CONTENT AND CALCULATION OF CRUDE PROTEIN CONTENT - PART 2: BLOCK DIGESTION AND STEAM DISTILLATION METHOD

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  01-01-2009

    Publisher:  National Standards Authority of Ireland

    For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
    Only cited Standards give presumption of conformance to New Approach Directives/Regulations.

    Dates of withdrawal of national standards are available from NSAI.

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    Table of Contents - (Show below) - (Hide below)

    Foreword
    1 Scope
    2 Normative references
    3 Terms and definitions
    4 Principle
    5 Reagents
    6 Apparatus
    7 Sampling
    8 Preparation of test sample
    9 Procedure
       9.1 General
       9.2 Test portion
       9.3 Determination
       9.4 Blank test
       9.5 Recovery tests
    10 Calculation and expression of results
       10.1 Calculation
       10.2 Calculation of crude protein content
       10.3 Expression of crude protein content results
    11 Precision
       11.1 Interlaboratory tests
       11.2 Repeatability
       11.3 Reproducibility
    12 Test report
    Annex A (informative) - Results of interlaboratory tests
    Annex B (informative) - Results of a proficiency test; comparison
            of the colorimetric and potentiometric endpoint
            determination of the titration
    Bibliography

    Abstract - (Show below) - (Hide below)

    Describes 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.

    General Product Information - (Show below) - (Hide below)

    Document Type Standard
    Publisher National Standards Authority of Ireland
    Status Current
    Supersedes

    Standards Referencing This Book - (Show below) - (Hide below)

    ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions
    ISO 8655-5:2002 Piston-operated volumetric apparatus Part 5: Dispensers
    ISO 1871:2009 Food and feed products General guidelines for the determination of nitrogen by the Kjeldahl method
    ISO 5983-1:2005 Animal feeding stuffs Determination of nitrogen content and calculation of crude protein content Part 1: Kjeldahl method
    ISO 385:2005 Laboratory glassware Burettes
    ISO 6497:2002 Animal feeding stuffs Sampling
    ISO 8655-2:2002 Piston-operated volumetric apparatus Part 2: Piston pipettes
    ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
    ISO 6498:2012 Animal feeding stuffs — Guidelines for sample preparation
    ISO 8655-3:2002 Piston-operated volumetric apparatus Part 3: Piston burettes
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