BS-EN-15111-2007.pdf
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1、BRITISH STANDARD BS EN 15111:2007 Foodstuffs Determination of trace elements Determination of iodine by ICP-MS (inductively coupled plasma mass spectrometry) The European Standard EN 15111:2007 has the status of a British Standard ICS 67.050 ? Licensed Copy: London South Bank University, London Sout
2、h Bank University, Mon Apr 16 02:49:10 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN 15111:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2007 BSI 2007 ISBN 978 0 580 50485 3 National foreword This British Standard was publi
3、shed by BSI. It is the UK implementation of EN 15111:2007. It supersedes DD CEN/TS 15111:2005 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee AW/-/3, Food analysis Horizontal methods. A list of organizations represented on AW/-/3 can be obtained on re
4、quest 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. Amendments issued since publication Amd. No. DateComme
5、nts Licensed Copy: London South Bank University, London South Bank University, Mon Apr 16 02:49:10 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15111 March 2007 ICS 67.050Supersedes CEN/TS 15111:2005 English Version Foodstuffs - Determination of tra
6、ce elements - Determination of iodine by ICP-MS (inductively coupled plasma mass spectrometry) Produits alimentaires - Dosage des lments traces - Dosage de liode par spectromtrie dmission avec plasma induit par haute frquence et spectromtre de masse (ICP- SM) Lebensmittel - Bestimmung von Elementspu
7、ren - Bestimmung von Iod mit der ICP-MS (Massenspektrometrie mit induktiv gekoppeltem Plasma) This European Standard was approved by CEN on 21 January 2007. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the
8、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 CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German
9、). 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 Rep
10、ublic, 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 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN D
11、E NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15111:2007: E Licensed Copy: London South Bank University, London South Bank
12、University, Mon Apr 16 02:49:10 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 15111:2007 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references4 3 Principle4 4 Reagents.4 5 Apparatus and equipment 6 6 Sampling.7 7 Procedure .7 8 Calculation9 9 Limit of quantification .9 10 Precision.9 11 Tes
13、t report10 Annex A (normative) Results of the inter-laboratory test.11 Bibliography12 Licensed Copy: London South Bank University, London South Bank University, Mon Apr 16 02:49:10 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 15111:2007 (E) 3 Foreword This document (EN 15111:2007) has been prepared
14、 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 national standard, either by publication of an identical text or by endorsement, at the latest by September 2007, and conflicting na
15、tional standards shall be withdrawn at the latest by September 2007. This document supersedes CEN/TS 15111:2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgari
16、a, Cyprus, Czech 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 United Kingdom. Licensed Copy: London South Bank U
17、niversity, London South Bank University, Mon Apr 16 02:49:10 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 15111:2007 (E) 4 1 Scope This European Standard specifies an extraction method for the determination of iodine compounds in foodstuffs by inductively coupled plasma mass spectrometry (ICP-MS).
18、2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 13804, Foodstuffs Deter
19、mination of trace elements Performance criteria, general considerations and sample preparation 3 Principle Iodine compounds are extracted with a strong alkaline reagent at elevated temperature. After removing un-dissolved components, the nebulized solution is atomized and ionized in an inductively c
20、oupled argon plasma. The ions are extracted from the plasma by a system of sampler and skimmer cones, separated in a mass spectrometer on the basis of their mass/charge ratio and determined using a pulse counting detector system. WARNING The use of this European Standard may involve hazardous materi
21、als, operations and equipment. This European Standard does not purport to address all the safety problems associated with its use. It is the responsibility of the user of this European Standard to establish appropriate safety and health practices and determine the applicability or regulatory limitat
22、ions prior to use. 4 Reagents 4.1 General The concentration of iodine in the reagents and water used shall be low enough not to affect the results of the determination, e.g. different qualities of TMAH are available. It is important to check, that the iodine content is low enough for the analysis. 4
23、.2 Tetramethylammonium hydroxide (TMAH = (CH3)4N+OH-) solution, mass concentration = 250 g/l, (mass fraction w = 25 %), suitable for trace analysis with an iodine content of less than 1 g/l. 4.3 Diluted tetramethylammonium hydroxide (TMAH) solution Dilute TMAH solution for preparing the zero member
24、compensation and calibration solutions, with a concentration to suit that of the sample solution (see 7.3). Prepare a 0,5 % TMAH solution by diluting 1,0 ml of TMAH solution (4.2) to 50 ml with water. 4.4 Stock solutions 4.4.1 General Commercial stock solutions may be used as an alternative to the s
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