BS ISO 11352-2012 Water quality Estimation of measurement uncertainty based on validation and quality control data《水质 基于验证和质量控制数据的测量不确定度评估》.pdf
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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 11352:2012Water quality Estimationof measurement uncertaintybased on validation and qualitycontrol dataBS ISO 11352:2012 BRITISH STANDARDNational forewordThis British Stan
2、dard is the UK implementation of ISO 11352:2012.The UK participation in its preparation was entrusted to TechnicalCommittee EH/3/2, Physical chemical and biochemical methods.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not pur
3、port to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 61295 4ICS 13.060.45Compliance with a British Standard cannot confer immunity fromlegal obligation
4、s.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2012.Amendments issued since publicationDate Text affectedBS ISO 11352:2012 ISO 2012Water quality Estimation of measurement uncertainty based on validation and quality control dataQuali
5、t de leau Estimation de lincertitude de mesure base sur des donnes de validation et de contrle qualitINTERNATIONAL STANDARDISO11352First edition2012-07-01Reference numberISO 11352:2012(E)BS ISO 11352:2012ISO 11352:2012(E)ii ISO 2012 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2012All rights
6、reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the re
7、quester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 11352:2012ISO 11352:2012(E) ISO 2012 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope 12 Normative referenc
8、es . 13 Terms and definitions . 14 Symbols . 45 Principle . 56 Procedure 57 Preparative considerations for the estimation of measurement uncertainty . 67.1 Specification of the measurement 67.2 Specification of the parametric form in which the measurement uncertainty is reported 68 Evaluation of ava
9、ilable precision and bias data . 78.1 Approach and criteria . 78.2 Within-laboratory reproducibility 88.3 Method and laboratory bias 109 Calculation of the combined standard uncertainty 1410 Calculation of the expanded uncertainty 1511 Estimation of measurement uncertainty from reproducibility stand
10、ard deviation .1512 Report .15Annex A (normative) Estimation of the standard uncertainty from range control charts 16Annex B (informative) Examples of the estimation of measurement uncertainty 17Bibliography .26BS ISO 11352:2012ISO 11352:2012(E)ForewordISO (the International Organization for Standar
11、dization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to
12、 be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Stand
13、ards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Inter
14、national Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 11352 was
15、 prepared by Technical Committee ISO/TC 147, Water quality, Subcommittee SC 2, Physical, chemical and biochemical methods.iv ISO 2012 All rights reservedBS ISO 11352:2012ISO 11352:2012(E)IntroductionThe basic principles of the estimation of measurement uncertainty are set out in ISO/IEC Guide 98-3.
16、There are several ways of estimating measurement uncertainty depending on the purpose of the estimation and the available data; Eurolab TR 19gives an overview of the main approaches.This International Standard specifies a set of procedures to enable laboratories to estimate the measurement uncertain
17、ty of their results, using an approach based on quality control results and validation data. It is structured in a way that is applicable to analysts that do not have a thorough understanding of metrology or statistics.NEN 77798and Nordtest TR 53710have been used as a basis for developing this Inter
18、national Standard. The approach taken is “top-down”, contrary to the mainly “bottom-up” strategy adopted in ISO/IEC Guide 98-3.It is statistically acceptable to combine a precision estimate and the uncertainty associated with the bias into one uncertainty measure. The sources of data for this approa
19、ch are method validation and analytical quality control. The experimental approach specified in this International Standard enables a greater coverage of the sources of variation observed during routine use of the analytical method. ISO 2012 All rights reserved vBS ISO 11352:2012BS ISO 11352:2012Wat
20、er quality Estimation of measurement uncertainty based on validation and quality control data1 ScopeThis International Standard specifies methods for the estimation of measurement uncertainty of chemical and physicochemical methods in single laboratories based on validation data and analytical quali
21、ty control results obtained within the field of water analysis.NOTE 1 The principles of the estimation of uncertainty specified in this International Standard are consistent with the principles described in ISO/IEC Guide 98-3.In this International Standard, the quantification of measurement uncertai
22、nty relies on performance characteristics of a measurement procedure obtained from validation and the results of internal and external quality control.NOTE 2 The approaches specified in this International Standard are mainly based on QUAM11, NEN 77798, Nordtest TR 53710, and Eurolab TR 19.NOTE 3 Thi
23、s International Standard only addresses the evaluation of measurement uncertainty for results obtained from quantitative measurement procedures. The uncertainties associated with results obtained from qualitative procedures are not considered.2 Normative referencesThe following referenced documents
24、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.ISO/IEC Guide 98-3:2008, Uncertainty of measurement Part 3: Guide to the expression o
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