CEN TR 10350-2013 Analysis of steels and irons - Internal laboratory procedure for checking the accuracy of an analytical method by using Certified Reference Materials《钢铁材料化学分析 使用标.pdf
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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationPD CEN/TR 10350:2013Analysis of steels and irons Internal laboratory procedurefor checking the accuracy ofan analytical method by usingCertified Reference MaterialsPD CEN/TR 1035
2、0:2013 PUBLISHED DOCUMENTNational forewordThis Published Document is the UK implementation ofCEN/TR 10350:2013. It supersedes PD CEN/TR 10350:2009 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ISE/102, Methods of Chemical Analysis for Iron and Steel. A
3、 list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013.Published by BSI Standards
4、Limited 2013.ISBN 978 0 580 77710 3 ICS 77.040.30 Compliance with a British Standard cannot confer immunity fromlegal obligations.This Published Document was published under the authority of theStandards Policy and Strategy Committee on 31 March 2013. Amendments issued since publicationDate T e x t
5、a f f e c t e dPD CEN/TR 10350:2013TECHNICAL REPORT RAPPORT TECHNIQUE TECHNISCHER BERICHT CEN/TR 10350 February 2013 ICS 77.040.30 Supersedes CEN/TR 10350:2009English Version Analysis of steels and irons - Internal laboratory procedure for checking the accuracy of an analytical method by using Certi
6、fied Reference Materials Analyse des aciers et des fontes - Procdure de contrle intralaboratoire de lexactitude dune mthode analytique au moyen de Matriaux de Rfrence Certifis Analyse von Stahl und Eisen - Laboratoriumsinternes Verfahren zur berprfung der Richtigkeit eines - Analysenverfahrens mit H
7、ilfe zertifizierter Referenzmaterialien This Technical Report was approved by CEN on 16 July 2012. It has been drawn up by the Technical Committee ECISS/TC 102. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Fo
8、rmer Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMI
9、T EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TR 10350:2013: EPD CEN/TR 10350:2013CEN/TR 10350:2013 (E) 2 Conten
10、ts Page Foreword . 3 Introduction 4 1 Scope 5 2 Principle 5 3 Terms and definitions 5 4 Procedure . 8 4.1 General . 8 4.2 Number of replicate determinations 8 4.3 CRMs 9 4.4 Determinations . 9 5 Evaluation of precision 10 5.1 Procedure . 10 5.2 Evaluation . 11 6 Assessment of the trueness 11 6.1 Pro
11、cedure . 11 6.2 Assessment 12 7 Conclusion . 12 Annex A (informative) Symbols used . 13 Annex B (informative) Table of the 2distribution . 14 Annex C (informative) Examples 15 Bibliography 23 PD CEN/TR 10350:2013CEN/TR 10350:2013 (E) 3 Foreword This document (CEN/TR 10350:2013) has been prepared by
12、Technical Committee ECISS/TC 102 “Methods of chemical analysis for iron and steel”, the secretariat of which is held by SIS. 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 iden
13、tifying any or all such patent rights. This document supersedes CEN/TR 10350:2009. In comparison with the previous version of CEN/TR 10350, the following significant technical changes were made: Definition 3.12: Correction of the definition for “uncertainty of the certified values”; Table C.7: Corre
14、ction of the confidence level for 2; C.2.3.3: Correction of the sample label: G instead of A. PD CEN/TR 10350:2013CEN/TR 10350:2013 (E) 4 Introduction This Technical Report defines a procedure for checking, in each specific laboratory, the accuracy of an analytical method by the application of stati
15、stical principles to the analytical results obtained on Certified Reference Materials (CRMs). This Technical Report is an adaptation of ISO Guide 33:2000 mostly for the specific cases where EURONORM-CRMs are used for checking, in an intralaboratory context, the accuracy of an analytical method. Neve
16、rtheless, it may be adopted in any other case where CRMs selected have similar quality levels to those of EURONORM-CRMs. PD CEN/TR 10350:2013CEN/TR 10350:2013 (E) 5 1 Scope The present statistical procedure describes how to check results for absence of bias by comparison of these analytical results
17、with those obtained during the certification of CRMs. If the resulting data confirm the absence of bias, the method may be considered accurate when applied to all steels and irons whose composition ranges are adequately covered or bounded by the CRMs used. The resulting data give also an estimate of
18、 the repeatability and/or the intermediate precision (“intralaboratory reproducibility“) for the CRMs used. The comparison of these analytical data with the repeatability data obtained during the certification may also be performed depending on the strict purpose of the method under consideration. F
19、or the purpose of this Technical Report, the use of existing CRMs is essential for the assessment of the trueness, but it may be only indicative for the other statistical data. NOTE This Technical Report does not describe the use of CRMs as calibrants, this subject being treated in ISO Guide 32. 2 P
20、rinciple This Technical Report describes a procedure for checking an analytical method used in a specific laboratory by using data obtained from the analysis of CRMs. The absence of bias ascertained with CRMs can be extended to the trueness of further analytical samples adequately covered or bounded
21、 by the selected CRMs. Nevertheless it should be underlined that this Technical Report is not appropriate for the assessment of the repeatability and/or the intermediate precision data of the further analytical samples to be tested by the analytical method under consideration. Checking the trueness
22、of an analytical method as applied by a specific laboratory involves the comparison of the mean value of the analytical results obtained by using CRMs with the certified value of each CRM selected. The standard deviation of the intralaboratory means of the selected CRMs is taken into account when ma
23、king this comparison. Moreover, adjustment values chosen in advance by the laboratory, according to economic or technical limitations or stipulations are also taken into account. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 certified refer
24、ence material CRM reference material characterized by a metrologically valid procedure for one or more specified properties, accompanied by a certificate that provides the value of the specified property, its associated uncertainty, and a statement of metrological traceability NOTE 1 The concept of
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