Analysis of steels and irons. Internal laboratory procedure for checking the accuracy of an analytical method by using Certified Reference Materials

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

03-31-2013

Publisher

British Standards Institution

Foreword
Introduction
1 Scope
2 Principle
3 Terms and definitions
4 Procedure
5 Evaluation of precision
6 Assessment of the trueness
7 Conclusion
Annex A (informative) - Symbols used
Annex B (informative) - Table of the chi[2] distribution
Annex C (informative) - Examples
Bibliography

Defines how to check results for absence of bias by comparison of these analytical results with those obtained during the certification of CRMs.

The present statistical procedure describes how to check results for absence of bias by comparison of these analytical results 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 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.

For 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.

Committee	ISE/1
DocumentType	Standard
Pages	28
PublisherName	British Standards Institution
Status	Current
Supersedes	PD CEN/TR 10350:2009

Standards	Relationship
CEN/TR 10350:2013	Identical

ISO Guide 33:2015	Reference materials Good practice in using reference materials
CEN/TR 10317:2014	European certified reference materials (EURONORM-CRMs) for the determination of the chemical composition of iron and steel products prepared under the auspices of the European Committee for Iron and Steel Standardization (ECISS)
ISO 3534-2:2006	Statistics Vocabulary and symbols Part 2: Applied statistics
ISO Guide 30:2015	Reference materials Selected terms and definitions
ISO 5725-2:1994	Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method

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PD CEN/TR 10350:2013

Current

Table of Contents

Abstract

Scope

General Product Information

International Equivalents

Standards Referencing This Book

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