BS-EN-13806-2002.pdf
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1、BRITISH STANDARD BS EN 13806:2002 Foodstuffs Determination of trace elements Determination of mercury by cold-vapour atomic absorption spectrometry (CVAAS) after pressure digestion The European Standard EN 13806:2002 has the status of a British Standard ICS 67.050 ? Licensed Copy: sheffieldun sheffi
2、eldun, na, Mon Oct 30 01:53:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 13806:2002 This British Standard, having been prepared under the direction of the Consumer Products and Services Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strateg
3、y Committee on 10 September 2002 BSI 10 September 2002 ISBN 0 580 40367 X National foreword This British Standard is the official English language version of EN 13806:2002 The UK participation in its preparation was entrusted to Technical Committee AW/-/3, Horizontal analysis, which has the responsi
4、bility 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 section entitled “Inter
5、national 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. Compliance with a Br
6、itish 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 related international
7、and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 11 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued
8、since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 01:53:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13806 August 2002 ICS 67.050 English version Foodstuffs - Determination of trace elements - Determin
9、ation of mercury by cold-vapour atomic absorption spectrometry (CVAAS) after pressure digestion Produits alimentaires - Dosage des lments-traces - Dosage du mercure par spectromtrie dabsorption atomique par gnration de vapeurs froides aprs digestion sous pression Lebensmittel - Bestimmung von Elemen
10、tspuren - Bestimmung von Quecksilber mit Atomabsorptionsspektrometrie (AAS)-Kaltdampftechnik nach Druckaufschluss This European Standard was approved by CEN on 29 May 2002. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Europe
11、an Standard the status 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 Management Centre or to any CEN member. This European Standard exists in three official versions (English, Fr
12、ench, 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Den
13、mark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 3
14、6 B-1050 Brussels 2002 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13806:2002 E Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 01:53:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13806:2002 (E) 2 Contents page Forewor
15、d3 1Scope 3 2Normative references 3 3Principle3 4Reagents.4 5Apparatus and equipment.5 6Procedure .5 7Calculation6 8Limit of quantification .6 9Precision.7 10Test report 8 Annex A (informative) Results of the interlaboratory tests .9 Bibliography11 Licensed Copy: sheffieldun sheffieldun, na, Mon Oct
16、 30 01:53:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13806:2002 (E) 3 Foreword This European Standard has been prepared by Technical Committee CEN/TC 275 “Food analysis - Horizontal methods“, the secretariat of which is held by DIN. This European Standard shall be given the status of a nationa
17、l standard, either by publication of an identical text or by endorsement, at the latest by February 2003, and conflicting national standards shall be withdrawn at the latest by February 2003. Annex A is informative. According to the CEN/CENELEC Internal Regulations, the national standards organizati
18、ons of the following coun- tries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Swe- den, Switzerland and the United Kingdom. 1 Scope This Eu
19、ropean Standard specifies a method for the determination of mercury in foodstuffs by cold-vapour atomic absorption spectrometry (CVAAS) after pressure digestion. Specific foodstuffs for which European Standards exist are excluded from the scope of this horizontal European Standard. It is the task of
20、 the analyst to review if vertical standards exist. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
21、 dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 13804, Foodstuffs D
22、etermination of trace elements Performance criteria, general considerations and sample preparation. EN 13805, Foodstuffs Determination of trace elements Pressure digestion. 3 Principle Determination of mercury in the test solution by cold-vapour atomic absorption spectrometry (CVAAS) after pressure
23、digestion according to EN 13805. The test solution is transferred to the reaction vessel of the mercury analysis unit, and the mercury is reduced with divalent tin or sodium borohydride and flushed into the cuvette of the AAS instrument using a carrier gas stream. The absorption at 253,7 nm (mercury
24、 line) is used as a measure of the mercury concentration in the cuvette. If the amounts of mercury in the test solution are very small, it is advisable to enrich the mercury expelled on a gold/platinum gauze (amalgam technique) prior to determination in the cuvette. Licensed Copy: sheffieldun sheffi
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