BS EN ISO BRITISH STANDARD 20541:2008 Milk and milk products - Determination of nitrate content - Method by enzymatic reduction and molecular-absorption spectrometry after Griess reaction (ISO 20541:2008) ICS 67.100.01 BSi British Standards BSENIS0 20541:2008 National foreword This British Standard is the UK implementation of EN ISO 20541:2008. The UK participation in its preparation was entrusted to Technical Committee AW/5, Chemical analysis of milk and milk products. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard Amendments/corrigenda issued since publication was published under the authority of the Standards Policy and Date Comments Strategy Committee on 30 September 2008 CBSI2008 ISBN 9780580569685 EUROPEANSTANDARD EN ISO 20541 NORME EUROPEENNE EUROPAISCHE NORM September 2008 ICS 67.100.01 English Version Milk and milk products - Determination of nitrate content Method by enzymatic reduction and molecular-absorption spectrometry after Griess reaction (IsO 20541:2008) Lait et produits laitiers - Determination de la teneur en Milch und Milcherzeugnisse - Bestimmung des nitrates - Methode par reduction enzymatique et Nitratgehaltes - Verfahren mit enzymatischer Reduktion spectrometrie d'absorption moleculaire apres reaction de und Molekulabsorptionsspektrometrie nach Griess- Griess (ISO 20541:2008) Reaktion (ISO 20541:2008) This European Standard was approved by CEN on 6 August 2008. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. cen EUROPEAN COMMITTEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPAISCHESKOMITEEFURNORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels @2008CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20541:2008: E worldwide for CEN national Members. BSENISO20541:2008 ENISO20541:2008 (E) Foreword This document (EN ISO 20541:2008)has beenprepared by Technical Committee ISO/TC 34"Agricultural food products" in collaboration with Technical Committee CEN/TC 302"Milk and milk products - Methods of This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2009, and conflicting national standards shall be withdrawn at thelatestbyMarch2009 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,Romania,Slovakia,Slovenia,Spain, Sweden, Switzerland and the United Kingdom. Endorsementnotice BSENISO20541:2008 ISO20541:2008(E) IDF 197:2008(E) Contents Page Foreword V Foreword. 1 Scope 2 Normative references 3 Terms and definitions. 4 Principle. 5 Reage