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  • DIN EN ISO 20541:2008-12

    Current The latest, up-to-date edition.

    MILK AND MILK PRODUCTS - DETERMINATION OF NITRATE CONTENT - METHOD BY ENZYMATIC REDUCTION AND MOLECULAR-ABSORPTION SPECTROMETRY AFTER GRIESS REACTION

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  01-01-2008

    Publisher:  German Institute for Standardisation (Deutsches Institut für Normung)

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

    Vorwort
    1 Anwendungsbereich
    2 Normative Verweisungen
    3 Begriffe
    4 Kurzbeschreibung
    5 Reagenzien
    6 Geräte
    7 Probenahme
    8 Vorbereitung der Untersuchungsprobe
       8.1 Milchpulver, Molkenpulver und
            Milcheiweisskonzentrate
       8.2 Caseine und Caseinate
       8.3 Käse
       8.4 Molkenkäse
    9 Durchführung
       9.1 Herstellung der Einwaage
       9.2 Abtrennung von Fett und Protein
       9.3 Reagenzien-Blindversuch
       9.4 Bestimmung
       9.5 Kalibrierung
    10 Berechnung und Auswertung
       10.1 Nitritgehalt (Matrix-Blindwert)
       10.2 Gesamtgehalt an Nitrit/Nitrat
       10.3 Nitratgehalt
    11 Präzision
       11.1 Ringversuch
       11.2 Wiederholpräzision
       11.3 Vergleichpräzision
    12 Untersuchungsbericht
    Anhang A (informativ) Ringversuche
    Literaturhinweise

    Abstract - (Show below) - (Hide below)

    Describes a method for the determination of the nitrate content of milk and milk products by molecular-absorption spectrometry after Griess reaction (preceded by enzymatic reduction).

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

    Development Note Supersedes DIN 10476. (12/2008)
    Document Type Standard
    Publisher German Institute for Standardisation (Deutsches Institut für Normung)
    Status Current

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

    DIN ISO 5725-2:2002-12 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 5725-2:1994 including Technical Corrigendum 1:2002)
    ISO 707:2008 Milk and milk products — Guidance on sampling
    ISO 1042:1998 Laboratory glassware One-mark volumetric flasks
    ISO 648:2008 Laboratory glassware — Single-volume pipettes
    ISO 835:2007 Laboratory glassware — Graduated pipettes
    ISO 565:1990 Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes of openings
    EN 12014-3:2005 Foodstuffs - Determination of nitrate and/or nitrite content - Part 3: Spectrometric determination of nitrate and nitrite content of meat products after enzymatic reduction of nitrate to nitrite
    DIN ISO 565:1998-12 TEST SIEVES - METAL WIRE CLOTH, PERFORATED METAL PLATE AND ELECTROFORMED SHEET - NOMINAL SIZES OF OPENINGS
    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 3696:1987 Water for analytical laboratory use — Specification and test methods
    DIN ISO 3696:1991-06 WATER FOR ANALYTICAL LABORATORY USE - SPECIFICATION AND TEST METHODS
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