Name: EN ISO 14673-1:2004
Brand: CEN

Milk and milk products - Determination of nitrate and nitrite contents - Part 1: Method using cadmium reduction and spectrometry (ISO 14673-1:2004)

Published date

01-02-2004

Publisher

Comite Europeen de Normalisation

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Sampling
8 Preparation of test sample
   8.1 Dried milk and dried whey
   8.2 Caseins and caseinates
   8.3 Cheese
   8.4 Whey cheese
9 Procedure
   9.1 Preparation of the copperized cadmium column
   9.2 Checking the reducing capacity of the column
   9.3 Regeneration of the column
   9.4 Preparation of test portion
   9.5 Extraction and deproteination
   9.6 Reduction of nitrate to nitrite
   9.7 Blank test
   9.8 Determination
   9.9 Preparation of calibration graph
10 Calculation and expression of results
   10.1 Nitrite content
   10.2 Nitrate content
11 Precision
   11.1 General
   11.2 Repeatability
12 Test report
Bibliography

ISO 14673-1|IDF 189-1:2004 specifies a method for the determination of the nitrate and nitrite contents of milk and milk products by cadmium reduction and spectrometry. The method is applicable to: whole and partly skimmed and skimmed dried milk; hard, semi-hard and soft cheeses; processed cheese; whey cheese, caseins and caseinates and dried whey.The method may be performed using automatic equipment, in particular by segmented flow analysis (SFA) or flow injection analysis (FIA), thus reducing cadmium contamination in laboratory work places and waste water.

Committee	CEN/TC 302
DocumentType	Standard
PublisherName	Comite Europeen de Normalisation
Status	Current

Standards	Relationship
BS EN ISO 14673-1:2004	Identical
I.S. EN ISO 14673-1:2004	Identical
UNI EN ISO 14673-1 : 2004	Identical
NBN EN ISO 14673-1 : 2004	Identical
UNE-EN ISO 14673-1:2004	Identical
NS EN ISO 14673-1 : 2ED 2004	Identical
SS-EN ISO 14673-1 : 2004	Identical
PN EN ISO 14673-1 : DEC 2004	Identical
ISO 14673-1:2004	Identical
SN EN ISO 14673-1 : 2004	Identical
NF EN ISO 14673-1 : 2004	Identical
NEN EN ISO 14673-1 : 2004	Identical
DIN EN ISO 14673-1:2004-05	Identical

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 565:1990	Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes of openings
ISO 835-1:1981	Laboratory glassware Graduated pipettes Part 1: General requirements