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AS 2850-1986

Withdrawn
Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

Chemical analysis - Interlaboratory test programs - For determining precision of analytical method(s) - Guide to the planning and conduct
Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Withdrawn date

09-30-2019

Language(s)

English

Published date

01-01-1986

Preview

1 - AS 2850-1986 CHEMICAL ANALYSIS - INTERLABORATORY TEST PROGRAMS - FOR DETERMINING PRECISION OF ANALYTICAL METHOD(S) - GUIDE TO
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE.
6 - 2 APPLICATION.
6 - 3 REFERENCED DOCUMENTS.
6 - 4 DEFINITIONS.
6 - 4.1 Accuracy
6 - 4.2 Bias
6 - 4.3 Cell
6 - 4.4 Critical difference
6 - 4.5 Critical value
6 - 4.6 Outlier
6 - 4.7 Precision
6 - 4.8 Range
6 - 4.9 Repeatability (r)
6 - 4.10 Replicate determinations
6 - 4.11 Reproducibility (R)
6 - 4.12 Single test result
7 - 4.13 Split-levels experiment
7 - 4.14 Straggler
7 - 4.15 Uniform-levels experiment
7 - 4.16 Within-laboratory reproducibility (R)
7 - 5 PRIOR DEVELOPMENT AND VALIDATION OF METHOD
7 - 6 SELECTION OF TEST MATERIALS.
7 - 7 LABORATORY / PERSONNEL REQUIREMENTS.
7 - 7.1 Qualifications and experience of personnel.
7 - 7.2 Laboratory-adherence to test schedule.
7 - 8 SETTING UP A TEST PROGRAM.
7 - 8.1 Choice of experiment.
7 - 8.2 Number of laboratories.
8 - 8.3 Number of concentration levels.
8 - 8.4 Number of replicate determinations.
8 - 8.5 Number of operators per laboratory.
8 - 8.6 Combining information.
8 - 9 EXECUTION OF TEST PROGRAMS.
8 - 9.1 Personnel and responsibilities.
8 - 9.2 Preliminaryconsiderations.
9 - 9.3 Preparation for the test.
9 - 9.4 Test instructions.
9 - 9.5 Reporting of results.
9 - 10 STATISTICAL ANALYSIS OF RESULTS.
9 - 10.1 General.
9 - 10.2 Personnel to analyze results.
9 - 10.3 Cells.
10 - 10.4 Excess data
10 - 10.5 Missing data.
10 - 10.6 Identification of outliers.
10 - 10.7 Calculation of repeatability and reproducibility.
10 - 11 EVALUATION OF PRECISION DATA.
10 - 12 EXPRESSION OF PRECISION DATA.
10 - 12.1 General.
11 - 12.2 Tabular format.
11 - 12.3 Functional relationships.
11 - 12.4 Statement on repeatability, within-laboratory reproducibility and reproducibility
11 - 12.5 Suspect results.
11 - 12.6 Reporting of experiment.
12 - APPENDIX A - STATISTICAL ANALYSIS AS A STEP BY STEP PROCEDURE
15 - APPENDIX B - STATISTICAL ANALYSIS FOR UNIFORM-LEVELS EXPERIMENTS
15 - B1 NOTATION, DEFINITIONS AND BASIC FORMULAS.
16 - B2 COCHRAN’S MAXIMUM VARIANCE TEST.
17 - B3 DIXON’S OUTLIER TEST.
18 - B4 CALCULATION OF REPEATABILITY AND REPRODUCIBILITY.
20 - B5 EXAMPLES.
24 - APPENDIX C - STATISTICAL ANALYSIS FOR SPLIT-LEVELS EXPERIMENTS
24 - C1 NOTATION, DEFINITIONS AND BASIC FORMULAS.
24 - C2 TESTING FOR OUTLIERS.
25 - C3 CALCULATION OF REPEATABILITY AND REPRODUCIBILITY.
25 - C4 EXAMPLE.
27 - APPENDIX D - CRITICAL DIFFERENCES DERIVABLE FROM REPEATABILITY AND REPRODUCIBILITY
27 - D1 CRITICAL DIFFERENCES FOR THE 95 PERCENT PROBABILITY LEVEL.
28 - D2 CRITICAL DIFFERENCES FOR PROBABILITY LEVELS OTHER THAN 95 PERCENT
29 - APPENDIX E - COMPUTER PROGRAM FOR CALCULATING REPEATABILITY AND REPRODUCIBILITY
29 - E1 INTRODUCTION.
40 - APPENDIX F - EXAMPLES OF INSTRUCTION/REPORTING SHEETS FOR ACQUIRING TEST DATA FROM PARTICIPATING LABORATORIES
40 - F1 EXAMPLE 1.
42 - F2 EXAMPLE 2.
43 - F3 EXAMPLE 3.
46 - F4 EXAMPLE 4.
48 - AOOENDIX G - ASSIGNMENT OF STATISTICAL SYMBOLS USED IN THIS STANDARD

Provides guidance in choosing procedures and determining parameters used to select and validate methods of chemical analysis through the determination of the precision of those methods. Precision is determined in terms of repeatability, within-laboratory reproducibility and reproducibility. Defines relevant statistical terms, specifies test material requirements and discusses the number of laboratories required as well as the functions of a 'steering' committee to coordinate activities. Includes computer program to calculate repeatability and reproducibility and four samples of results sheets. Applicable to laboratories reasonably experienced in the methods to be evaluated with respect to the materials being analyzed.

This standard sets out procedures for the planning and execution of interlaboratory test programs, including the evaluation of results, to determine the precision of methods of chemical analysis in terms of repeatability, within-laboratory reproducibility and reproducibility.NOTE: Depending upon the plan selected for the test program (see Clause 8.1), and with due consideration of industrial practice, it may be (more) appropriate, within the context of the statistical treatment of results, that the term 'repeatability (r)' be regarded as being interchangeable with or additional to the term 'within laboratory reproducibility (Rw)' as defined in this standard.

Committee
CH-023
DocumentType
Standard
ISBN
0 7262 4229 2
Pages
43
PublisherName
Standards Australia
Status
Withdrawn
Supersedes

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AS 2667-1983 Chemical testing - Sampling - Glossary of terms

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AS 3515.3-2002 Gold and gold bearing alloys - Determination of gold content (greater than 99.5%) - Gravimetric (fire assay) method
AS 4873.2-2009 Recommended practice for inductively coupled plasma mass spectrometry (ICP-MS) Quantitative determination - Water
AS 2879.2-2003 Alumina - Determination of particles passing a 20 micrometre aperture sieve
AS 1515.3-1989 Copper Alloys Determination of silver content - Flame atomic absorption spectrometric methods (Reconfirmed 2016)
AS 1329.6-1981 Methods for the analysis of zinc and zinc alloys Determination of copper content (0.25 percent to 1.25 percent) - Flame atomic absorption spectrometric method
AS 3506-1987 Waters - Determination of filtrable synthetic anionic surfactants - Copper-ethylenediamine flame atomic absorption spectrometric method
AS/NZS 1580.214.4:1996 Paints and related materials - Methods of test Consistency - Rotothinner (Reconfirmed 2013)
AS 1050.29-1989 Methods for the analysis of iron and steel Determination of cobalt content - Flame atomic absorption spectrometric method (Reconfirmed 2016)
AS 2383-1986 Waters - Determination of calcium - EDTA complexometric titration method
AS 2879.7-1997 Alumina Determination of trace elements - Wavelength dispersive X-ray fluorescence spectrometric method (Reconfirmed 2013)
AS 3550.6-1990 Waters Determination of filtrable calcium - Flame atomic absorption spectrometric method (Reconfirmed 2017)
AS 3515.3-1995 Gold and gold bearing alloys - Determination of gold content (greater than 99.5 percent) - Gravimetric method
AS 1580.214.3-1993 Paints and related materials - Methods of test Viscosity - Cone-and-plate
AS 1329.6-1994 Methods for the analysis of zinc and zinc alloys Determination of copper content (0.25% to 1.25%) - Flame atomic absorption spectrometric method
AS 2879.5-1994 Alumina - Determination of angle of flow
AS 3550.4-1990 Waters Determination of solids - Gravimetric method
AS 4195.1-1994 Analysis of serum and plasma for trace elements Determination of aluminium content - Graphite furnace atomic absorption spectrometric method
AS 2134.2-1999 Recommended practice for chemical analysis by atomic absorption spectrometry Graphite furnace spectrometry (Reconfirmed 2016)
AS 5239-2011 Examination of ignitable liquids in fire debris
AS 3587.2-1989 Ferroalloys - Chemical analysis - Determination of manganese content of ferromanganese and ferrosilicomanganese
AS 3870-1991 Certified reference materials - General guide to material selection, preparation, testing and certification
AS 3587.1-1989 Ferroalloys - Chemical analysis - Determination of silicon content of ferrosilicon and ferrosilicomanganese
AS 3515.2-1993 Gold and gold bearing alloys - Determination of gold content (30 percent - 99.5 percent) - Gravimetric method
AS 1696.2-1997 Copper Determination of copper content - Electrogravimetric method
AS 4479.3-1999 Analysis of soils Determination of metals in aqua regia extracts of soil by flam atomic absorption spectrometry (Reconfirmed 2018)
AS 3580.11.1-1993 Methods for sampling and analysis of ambient air Determination of volatile organic compounds - Methane and non-methane volatile organic compounds - Direct-reading instrumental method
AS 3844-1998 Recommended practice for metal analysis by electrochemical stripping techniques
AS 1671.4-1988 Lead and lead alloys Determination of tin in antimonial lead - Flame atomic absorption spectrometric method (Reconfirmed 2016)
AS/NZS 1050.2:1994 Methods for the analysis of iron and steel Determination of carbon content - Gravimetric method (Reconfirmed 2016)
AS 1038.16-2005 Coal and coke - Analysis and testing Assessment and reporting of results (Reconfirmed 2016)
AS 3587.4-1998 Ferroalloys - Chemical analysis Determination of carbon content - Infrared method
AS 1329.1-1994 Methods for the analysis of zinc and zinc alloys Determination of aluminium content - Titrimetric method
AS 3515.1-1996 Gold and gold bearing alloys - Determination of gold content (less than 30%) - Gravimetric method
AS/NZS 1050.16:1994 Methods for the analysis of iron and steel Determination of sulfur content - Infrared absorption method after combustion in an induction furnace (Reconfirmed 2017)
AS 3641.1-1999 Recommended practice for atomic emission spectrometric analysis Principles and techniques
AS/NZS 1050.18:1994 Methods for the analysis of iron and steel Determination of phosphorus - Spectrophotometric method (Reconfirmed 2016)
AS 4861-2004 Aluminium and aluminium alloys - Determination of impurities and alloying elements - Atomic emission spectrometric method
AS/NZS 1050.27:1994 Methods for the analysis of iron and steel Determination of titanium content - Spectrophotometric method (Reconfirmed 2016)
AS 3515.4-2007 Gold and gold bearing alloys Determination of gold content (greater than 99.95%) - Inductively coupled plasma - Atomic emission spectrometry
TR 2.12C-2 Certified reference materials - Coal - Preparation and certification of ASCRM 012C-2
AS 2411-1993 Venous blood - Determination of lead content - Flame atomic absorption spectrometric method
TR 2.12B-3 Reference Materials - Coal - Preparation of ASRM 012B-3
AS 2929-1990 Test methods - Guide to the format, style and content
AS 3587.6-1998 Ferroalloys - Chemical analysis Determination of phosphorus content- Spectrophotometric method
AS 1329.3-1994 Methods for the analysis of zinc and zinc alloys Determination of aluminium content - Flame atomic absorption spectrometric method (Reconfirmed 2016)
AS 1038.10.1-2003 Coal and coke - Analysis and testing Determination of trace elements - Coal, coke and fly-ash - Determination of eleven trace elements - Flame atomic absorption spectrometric method (Reconfirmed 2013)
AS 3550.1-1988 Methods for the analysis of waters Determination of dissolved sulphide - spectrophotometric method
AS/NZS 1050.28:1994 Methods for the analysis of iron and steel Vanadium in steel - Potentiometric method (Reconfirmed 2016)
AS 5006.2-2002 Silver and silver bearing alloys - Determination of silver content (1% to 99%) - Gravimetric (fire assay) method
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AS 4873.1-2005 Recommended practice for inductively coupled plasma-mass spectrometry (ICP-MS) - Principles and techniques
AS 3587.3-1991 Ferroalloys - Chemical analysis - Determination of chromium content of ferrochromium and ferrosilicochromium
AS 1329.8-1994 Methods for the analysis of zinc and zinc alloys Determination of cadmium content - Flame atomic absorption spectrometric method
AS 2134.1-1999 Recommended practice for chemical analysis by atomic absorption spectrometry Flame atomic absorption spectrometry (Reconfirmed 2016)
AS 1038.10.1-1986 Coal and coke - Analysis and testing Determination of trace elements - Determination of eleven trace elements in coal, coke and fly-ash - Flame atomic absorption spectrometric method
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AS 1329.5-1994 Methods for the analysis of zinc and zinc alloys Determination of copper content (0.0001% to 0.0025%) - Flame atomic absorption spectrometric method (Reconfirmed 2016)
AS 3895.1-1991 Methods for the analysis of copper, lead, zinc, gold and silver ores Determination of gold (Fire assay - Flame AAS method)
AS 5006.1-2002 Silver and silver bearing alloys Determination of silver content (0.1% to 99.9%) - Tritrimetric (potentiometric) method (Reconfirmed 2016)
AS 3515.3:2019 Gold and gold bearing alloys Determination of gold content (greater than 99.5 %) - Gravimetric (fire assay) method
AS 1515.1-1994 Copper alloys Determination of lead in copper alloys (flame atomic absorption spectrometric method) (Reconfirmed 2016)
AS/NZS 1050.38:1994 Methods for the analysis of iron and steel Determination of vanadium content - Flame atomic absorption spectrometric method (Reconfirmed 2016)
AS/NZS 1050.32:1994 Methods for the analysis of iron and steel Determination of carbon content - Infrared method (Reconfirmed 2017)
AS 3587.5-1998 Ferroalloys - Chemical analysis Determination of sulfur content - Infrared method
AS 1329.7-1994 Methods for the analysis of zinc and zinc alloys Determination of lead content - Flame atomic absorption spectrometric method (Reconfirmed 2016)
AS 2879.5-2004 Alumina Determination of angle of flow (Reconfirmed 2016)
AS 4862-2000 Lead and lead alloys - Determination of impurities and alloying elements - Atomic emission spectrometric method
AS 4030.1-1992 Methods for the analysis of lead sulfide concentrates Determination of lead content - Acid dissolution solvent extraction EDTA titration method
AS 1038.16-1996 Coal and coke - Analysis and testing - Assessment and reporting of results
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AS 1580.301.1-1992 Paints and related materials - Methods of test Non-volatile content by mass
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AS/NZS 1050.14:1994 Methods for the analysis of iron and steel Determination of manganese in iron and steel - Titrimetric method
AS 2879.4-2003 Alumina - Determination of specific surface area by nitrogen adsorption
AS 1580.301.2-1990 Paints and related materials - Methods of test Non-volatile content by volume (volume solids) (Reconfirmed 2013)
AS 1580.214.3-2003 Paints and related materials - Methods of test Viscosity - Cone-and-plate
AS 3753-2001 Recommended practice for chemical analysis by ultraviolet/visible spectrophotometry
AS 4090-1993 Whole blood - Determination of lead content - Graphite furnace atomic absorption spectrometric method
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AS 1515.2-1994 Copper alloys Determination of manganese content - Flame atomic absorption spectrometric method
TR 2.13-4 Certified reference materials - Coal - Preparation and certification of ASCRM 013-4
AS 2879.4-1991 Alumina - Determination of specific surface area by nitrogen adsorption
AS 2879.10-2003 Alumina - Determination of attrition index
AS 2879.3-1991 Alumina - Determination of alpha alumina content by X-ray diffraction
AS 2976-1987 Waters - Determination of filtrable magnesium - Flame atomic absorption spectrometric method (Reconfirmed 2017)
AS 3515.2-2002 Gold and gold bearing alloys - Determination of gold content 30% to 99.5% - Gravimetric (fire assay) method
AS 1329.2-1994 Methods for the analysis of zinc and zinc alloys Determination of magnesium content - Flame atomic absorption spectrometric method
AS 4764-2003 Guidelines for validation procedures for chemical analysis of agricultural and contaminated soil
AS 4205.2-1994 Analysis of urine for trace elements Determination of copper, cadmium and lead - Flame atomic absorption spectrometric method
SA TR 2.27-2013 Certified reference material Alumina - Preparation and certification of ASCRM 027
AS 3741-1990 Recommended practice for chemical analysis by ion chromatography
AS 3988-1991 Copper, lead, zinc, gold and silver ores - Guide to sample preparation for the determination of gold (Reconfirmed 2016)
AS 1038.22-1992 Coal and coke - Analysis and testing Higher rank coal - Mineral matter and water of constitution
AS 2879.3-2010 Alumina Determination of alpha alumina content by X-ray diffraction (Reconfirmed 2013)
TR 2.12B-2 Certified reference materials - Coal - Preparation and certification of ASCRM-012B-2
AS 2134.3-1994 Recommended practice for chemical analysis by atomic absorption spectrometry Vapour generation atomic absorption spectrometry
AS 3515.1:2019 Gold and gold bearing alloys Determination of gold content (less than 30%) - Gravimetric (fire assay) method
AS/NZS 1050.6:1995 Methods for the analysis of iron and steel Determination of tin content - Flame atomic absorption spectrometric method (Reconfirmed 2016)
AS 4479.2-1997 Analysis of soils Extraction of heavy metals and metalloids from soil by aqua regia - Hotplate digestion method
AS/NZS 1050.31:1994 Methods for the analysis of iron and steel Determination of niobium content - PAR spectrophotometric method (Reconfirmed 2016)
AS 3719.1-1989 Aluminium and aluminium alloys Determination of iron - Spectrophotometric method
AS 3515.2:2019 Gold and gold bearing alloys Determination of gold content (30 % to 99.5 %) - Gravimetric (fire assay) method
AS 2879.9-2002 Alumina Determination of flow time (Reconfirmed 2013)
TR 2.12C-3-2008 Certified reference materials Coal - Preparation and certification of ASCRM 012C-3
AS/NZS 1050.20:1994 Methods for the analysis of iron and steel Determination of magnesium content - Flame atomic absorption spectrometric method (Reconfirmed 2016)
AS 5006.1:2019 Silver and silver bearing alloys Determination of silver content (0.1 % to 99.9 %) - Titrimetric (potentiometric) method
AS 4010-1992 Analysis of detergents
AS/NZS 1580.214.2:1996 Paints and related materials - Methods of test Consistency - Flow cup (Reconfirmed 2013)
AS 2879.1-2000 Alumina - Determination of loss of mass at 300 degrees Celsius and 1000 degrees Celsius
AS 2879.8-2000 Alumina Determination of bulk density (Reconfirmed 2013)
AS 2882-1986 Waters - Determination of chromium(VI) (diphenylcarbazide spectrophotometric method)
AS/NZS 1050.39:1994 Methods for the analysis of iron and steel Determination of chromium content - Flame atomic absorption spectrometric method (Reconfirmed 2016)
AS/NZS 1050.26:1994 Methods for the analysis of iron and steel Silicon in iron and steel - Spectrophotometric method (Reconfirmed 2016)
AS 1038.10.4-2001 Coal and coke - Analysis and testing Determination of trace elements - Coal, coke and fly-ash - Determination of fluorine content - Pyrohydrolysis method (Reconfirmed 2013)

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