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)

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

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).

DevelopmentNote	Supersedes DIN 10476. (12/2008)
DocumentType	Standard
Pages	22
PublisherName	German Institute for Standardisation (Deutsches Institut für Normung)
Status	Current

Standards	Relationship
EN ISO 20541:2008	Identical
ISO 20541:2008	Identical

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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DIN EN ISO 20541:2008-12

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

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