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BS ISO 5725-6:1994

Current
Current

The latest, up-to-date edition.

Accuracy (trueness and precision) of measurement methods and results Use in practice of accuracy values
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

05-09-2002

Publisher

British Standards Institution

Foreword
Introduction
1. Scope
2. Normative references
3. Definitions
4. Determination of limits
     4.1 Repeatability and reproducibility limits
     4.2 Comparisons based on more than two values
5. Methods for checking the acceptability of test
     results and determining the final quoted result
     5.1 General
     5.2 Methods for checking the acceptability of test
          results obtained under repeatability conditions
     5.3 Methods for checking the acceptability of test
          results obtained under both repeatability and
          reproducibility conditions
6. Method for checking the stability of test results
     within a laboratory
     6.1 Background
     6.2 Methods for checking stability
7. Use of repeatability and reproducibility standard
     deviations in assessing laboratories
     7.1 Assessment method
     7.2 Evaluation of the use of a measurement method
          by a laboratory not previously assessed
     7.3 Continued assessment of previously approved
          laboratories
8. Comparison of alternative measurement methods
     8.1 Origin of alternative measurement methods
     8.2 Purpose of comparing measurement methods
     8.3 Method B is a candidate for an alternative standard
          method ("Standardization experiment" not defined)
     8.4 Accuracy experiment
     8.5 Method B is a candidate for a routine method
Annex A (normative) Symbols and abbreviations used in
        ISO 5725

Gives indications of the way in which accuracy data can be used in various practical situations. Concerned exclusively with measurement methods which yield measurements on a continuous scale and give a single numerical figure as the result. Coverage includes: repeatability and reproducibility limits; comparison of alternative measurement methods; method for checking the stability of test results within a laboratory. Also gives definitions.

1.1 The purpose of this part of ISO5725 is to give some indications of the way in which accuracy data can be used in various practical situations by: giving a standard method of calculating the repeatability limit, the reproducibility limit and other limits to be used in examining the test results obtained by a standard measurement method;providing a way of checking the acceptability of test results obtained under repeatability or reproducibility conditions;describing how to assess the stability of results within a laboratory over a period of time, and thus providing a method of “quality control?? of the operations within that laboratory;describing how to assess whether a given laboratory is able to use a given standard measurement method in a satisfactory way;describing how to compare alternative measurement methods. 1.2 This part of ISO5725 is concerned exclusively with measurement methods which yield measurements on a continuous scale and give a single numerical figure as the result, although this single figure may be the outcome of a calculation from a set of observations. 1.3It is assumed that the estimates of trueness and precision for the method have been obtained in accordance with parts1 to 5 of ISO5725. 1.4Any additional information regarding the field of application will be given at the beginning of each particular application.

Committee
SS/6
DevelopmentNote
Together with BS ISO 5725-1, BS ISO 5725-2, BS ISO 5725-3, BS ISO 5725-4 and BS ISO 5725-5, supersedes BS 5497-1(1987) Supersedes 90/97781 DC (03/2002)
DocumentType
Standard
Pages
58
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
ISO 5725-6:1994/Cor 1:2001 Identical
ISO 5725-6:1994 Identical

DD ENV 12142:1997 Method for determination of stable hydrogen isotope ratio (<sup>2</sup>H/<sup>1</sup>H) of water from fruit juices, using isotope ratio mass spectrometry
BS EN 1528-1:1997 Fatty food. Determination of pesticides and polychlorinated biphenyls (PCBs) General
BS EN 1376:1997 Foodstuffs. Determination of saccharin in table top sweetener preparations. Spectrometric method
BS EN 12145:1997 Fruit and vegetable juices. Determination of total dry matter. Gravimetric method with loss of mass on drying
DD ENV 12140:1997 Method for determination of stable carbon isotope ratio (<sup>13</sup>C/<sup>12</sup>C) of sugars from fruit juices, using isotope ratio mass spectrometry
BS EN 12146:1997 Fruit and vegetable juices. Enzymatic determination of sucrose content. NADP spectrometric method
BS EN 12148:1997 Fruit and vegetable juices. Determination of hesperidin and naringin in citrus juices. Method using high performance liquid chromatography
BS 4401-6:1996 Methods of test for meat and meat products Determination of chloride content (Volhard method)
BS 4401-5:1996 Methods of test for meat and meat products Determination of free fat content
BS EN 12147:1997 Method for determination of titratable acidity of fruit and vegetable juices
BS EN 12143:1997 Fruit and vegetable juices. Estimation of soluble solids content. Refractometric method
BS EN 1378:1997 Foodstuffs. Determination of aspartame in table top sweetener preparations. Method by high performance liquid chromatography
BS 4325-12:1996 Methods for analysis of oilseed residues Determination of glucosinolates content by high-performance liquid chromatography
BS 6200-5:1997 Sampling and analysis of iron, steel and other ferrous metals Guidelines on statistical procedures
DD ENV 12141:1997 Method for determination of stable oxygen isotope ratio (<sup>18</sup>O/<sup>16</sup>O) of water from fruit juices, using isotope ratio mass spectrometry
BS EN 1379:1997 Foodstuffs. Determination of cyclamate and saccharin in liquid table top sweetener preparations. Method by high performance liquid chromatography
BS EN 1377:1997 Foodstuffs. Determination of acesulfame K in table top sweetener preparations. Spectrometric method
BS EN 12144:1997 Fruit and vegetable juices. Determination of total alkalinity of ash. Titrimetric method

ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions
ISO 5725-3:1994 Accuracy (trueness and precision) of measurement methods and results — Part 3: Intermediate measures of the precision of a standard measurement method
ISO Guide 33:2015 Reference materials Good practice in using reference materials
ISO/IEC Guide 25:1990 General requirements for the competence of calibration and testing laboratories
ISO Guide 35:2017 Reference materials Guidance for characterization and assessment of homogeneity and stability
ISO 5725-4:1994 Accuracy (trueness and precision) of measurement methods and results Part 4: Basic methods for the determination of the trueness of a standard measurement method
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
ISO 3534-1:2006 Statistics — Vocabulary and symbols — Part 1: General statistical terms and terms used in probability

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