ISO-11726-2004.pdf
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1、 Reference number ISO 11726:2004(E) ISO 2004 INTERNATIONAL STANDARD ISO 11726 First edition 2004-08-15 Solid mineral fuels Guidelines for the validation of alternative methods of analysis Combustibles minraux solides Lignes directrices pour la validation de variantes analytiques Copyright Internatio
2、nal Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/16/2007 09:59:21 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 11726:2004(E) PDF disclaimer This PDF file may contain embedded typefaces. In ac
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5、inting. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2004 All rights reserved. Unless otherwise specified, no part of thi
6、s 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 requester. ISO copyright office Case postale 56 CH-121
7、1 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2004 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/1
8、6/2007 09:59:21 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 11726:2004(E) ISO 2004 All rights reserved iii Contents Page Forewordiv 1 Scope1 2 Normative references .1 3 Terms and definitions.1 4 General.2 5 Preliminary work on the alternative method3 5.1 General.3 5
9、.2 Selectivity and specificity 3 5.3 Range and linearity.3 5.4 Sensitivity 3 5.5 Limit of detection 4 5.6 Limit of quantitation4 5.7 Ruggedness.4 5.8 Accuracy4 5.9 Precision4 6 Defining the alternative method to be validated4 7 Procedure.5 7.1 Measurement of precision and trueness5 7.2 Comparison wi
10、th reference materials.6 7.3 Comparison with International Standard method within a laboratory Single fuel 10 7.4 Comparison using the International Standard method within a laboratory Range of fuels12 7.5 Comparison using the International Standard Method, between laboratories.13 8 Validation repor
11、t13 Annex A (informative) Explanation of rationale of method A 14 Annex B (informative) Example calculations.16 Bibliography .24 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/16/2007 09:59:21 MDTNo rep
12、roduction or networking permitted without license from IHS -,-,- ISO 11726:2004(E) iv ISO 2004 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standar
13、ds 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 be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take
14、 part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is
15、to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility
16、 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 11726 was prepared by Technical Committee ISO/TC 27, Solid mineral fuels, Subcommittee SC 5, Methods of analysis. Copyright Internatio
17、nal Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/16/2007 09:59:21 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 11726:2004(E) ISO 2004 All rights reserved 1 Solid minera
18、l fuels Guidelines for the validation of alternative methods of analysis 1 Scope This International Standard describes procedures for validating alternative methods of analysis for coal and coke either directly by comparison with the relevant International Standard method or indirectly by comparison
19、 with reference materials that have been exhaustively analysed using the relevant International Standard method. The statistical analysis methods used are parametric, i.e. their use is possible only when the characteristic is expressed as a simple number on an approximately linear scale. The results
20、 from some methods, for example the Gray-King coke type, are not so expressed and the methods given here should be used only if the data are converted to a parametric scale. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated re
21、ferences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5725-6, Accuracy (trueness and precision) of measurement methods and results Part 6: Use in practice of accuracy values 3 Terms and definitions For
22、the purposes of this document, the following terms and definitions apply. 3.1 accuracy closeness of agreement between a test result and the acceptable reference value NOTE The term accuracy, when applied to a set of results, describes a combination of random components and a common systematic error
23、or bias component. 3.2 bias difference between the expectation of the test results and an accepted reference value NOTE Bias is a systematic error as contrasted to random error. There may be one or more systematic error components contributing to the bias. A larger systematic difference from the acc
24、epted reference value is reflected by a larger bias value. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/16/2007 09:59:21 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 1
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