BS-EN-ISO-14673-2-2004.pdf
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1、BRITISH STANDARD BS EN ISO 14673-2:2004 Incorporating Corrigendum No. 1 Milk and milk products Determination of nitrate and nitrite contents Part 2: Method using segmented flow analysis (Routine method) The European Standard EN ISO 14673-2:2004 has the status of a British Standard ICS 67.100.10 ? Li
2、censed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:29:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 14673-2:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 25 February 2004 BSI 19 March 2004 ISBN 0 580 43490 7 National for
3、eword This British Standard is the official English language version of EN ISO 14673-2:2004. It is identical with ISO 14673-2:2004. It supersedes BS EN ISO 14673-2:2001 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee AW/5, Milk and milk products, whic
4、h has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the secti
5、on entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Co
6、mpliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor rela
7、ted international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to v, a blank page, pages 1 to 14, the Annex ZA page and a back cove
8、r. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments 15080 Corrigendum No. 1 19 March 2004 Corrected EN ISO foreword page and incorporating the Annex ZA Licensed Copy: sheffieldun sheffieldun, na
9、, Sun Nov 19 15:29:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14673-2 February 2004 ICS 67.100.10Supersedes EN ISO 14673-2:2001 English version Milk and milk products - Determination of nitrate and nitrite contents - Part 2: Method using se
10、gmented flow analysis (Routine method) (ISO 14673-2:2004) Lait et produits laitiers - Dtermination des teneurs en nitrates et en nitrites - Partie 2: Mthode danalyse par flux continus segments (Mthode de routine) (ISO 14673- 2:2004) Milch und Milchprodukte - Bestimmung des Nitrat- und Nitritgehaltes
11、 - Teil 2: Verfahren mit segmentierter Flieanalyse (Routineverfahren) (ISO 14673-2:2004) This European Standard was approved by CEN on 2 February 2004. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the statu
12、s of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A ve
13、rsion in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Est
14、onia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES
15、KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2004 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 14673-2:2004: E Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:29:42 GMT+00:00 2006, Uncon
16、trolled Copy, (c) BSI CORRECTED 2004-02-25 Foreword This document (EN ISO 14673-2:2004) has been prepared by Technical Committee ISO/TC 34 “Agricultural food products“ in collaboration with Technical Committee CEN/TC 302 “Milk and milk products - Methods of sampling and analysis“, the secretariat of
17、 which is held by NEN. 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 August 2004, and conflicting national standards shall be withdrawn at the latest by August 2004. This document supersedes EN
18、ISO 14673-2:2001. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
19、 Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 14673-2:2004 has been approved by CEN as EN ISO 14673-2:2004 without any modifications. NOTE Normative references
20、 to International Standards are listed in Annex ZA (normative). EN ISO 146732:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:29:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference numbers ISO 14673-2:2004(E) IDF 189-2:2004(E) INTERNATIONAL STANDARD ISO 14673-2 IDF 189-2 Second ed
21、ition 2004-02-01 Milk and milk products Determination of nitrate and nitrite contents Part 2: Method using segmented flow analysis (Routine method) Lait et produits laitiers Dtermination des teneurs en nitrates et en nitrites Partie 2: Mthode danalyse par flux continus segments (Mthode de routine) E
22、N ISO 146732:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:29:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii EN ISO 146732:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:29:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Contents Page Forewordiv 1 Scope1 2 Normat
23、ive references .1 3 Terms and definitions.1 4 Principle.2 4.1 Nitrate determination2 4.2 Nitrite determination.2 5 Reagents2 6 Apparatus.5 7 Sampling5 8 Preparation of test sample.6 8.1 Cheese6 8.2 Dried milk products and infant food.6 8.3 Milk and liquid milk products.6 9 Procedure.6 9.1 Preparatio
24、n of the reduction column6 9.2 Checking the reducing capacity of the column.7 9.3 Determination of nitrate content .7 9.4 Determination of nitrite content 8 9.5 Calibration curve.9 9.6 Checking the drift of standard solutions9 10 Calculation and expression of results9 10.1 Calculation.9 10.2 Express
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