ASTM D2013-00

Standard Practice of Preparing Coal Samples for Analysis

SCOPE
1.1 This practice covers the reduction and division of gross or divided samples up to and including the individual portions for laboratory analysis.
1.2 Reduction and division procedures are prescribed for coals of the following groups:
1.2.1 Group A includes coals that have been cleaned in all sizes.
1.2.2 Group B includes all other coals. Unknown coals are to be considered under Group B.
1.2.3 Group A allows smaller weight laboratory samples to be retained than Group B. These lower weights may be used for particular coals if they have been shown, by using the procedures of Annex A1.2, to give a sample preparation and analysis variance which is no more than 20 % of the total analysis variance.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are provided for information purposes only.

General Information

• Status: Historical
• Publication Date: 09-Nov-2001
• ICS: 73.040 - Coals
• Technical Committee: D05 - Coal and Coke
• Drafting Committee: D05.23 - Sampling

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D2013–00
Standard Method of
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Preparing Coal Samples for Analysis
This standard is issued under the fixed designation D2013; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (ε) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
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1.1 This method covers the reduction and division of gross 2.1 ASTM Standards:
or divided samples, collected in accordance withTest Methods D197 Test Method for Sampling and Fineness Test of
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D2234, up to and including the individual portions for Pulverized Coal
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laboratory analysis. D410 Method for Sieve Analysis of Coal
1.2 Reduction and division procedures are prescribed for D431 Method for Designating the Size of Coal from its
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coals of the following groups: Sieve Analysis
1.2.1 Group A includes coals that have been cleaned in all D2234 Test Methods for Collection of a Gross Sample of
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sizes. Coal
1.2.2 Group B includes all other coals. Unknown coals are D3173 TestMethodforMoistureintheAnalysisSampleof
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to be considered under Group B. Coal and Coke
1.2.3 GroupAallowssmallerweightsoflaboratorysamples D3174 TestMethodforAshintheAnalysisSampleofCoal
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toberetainedthanGroupB.Theselowerweightsmaybeused and Coke from Coal
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for particular coals if they have been shown by using the D3302 Test Method for Total Moisture in Coal
procedure of Annex A1.2 to give a sample preparation and E11 Specification for Wire-Cloth Sieves for Testing Pur-
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analysis variance which is no more than 20% of the total poses
allowable variance. E177 Practice for Use of the Terms Precision and Bias in
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1.3 Two methods are given for preparing the analysis ASTM Test Methods
sample for making the moisture determinations:
3. Significance and Use
1.3.1 RefereeMethod—Thismethodshallbeusedwherethe
3.1 This method is intended to provide an analysis sample
possibility of unaccounted changes in moisture content during
of coal from a gross or divided sample that has been collected
the reduction and division of the gross or divided sample must
be held to a minimum. It is intended to be used for evaluation inaccordancewithTestMethodsD2234.Inaddition,amethod
to determine the percent air dried moisture loss of the sample
of nonreferee methods and for testing of equipment. Only
under certain conditions will this referee method be directly is provided. The analysis sample can be used to determine the
value of the coal represented, its ability to meet specifications,
applicable to routine test programs.
1.3.2 Nonreferee Method—This method may be used for its environmental impact, as well as for other purposes.
routine work.
4. Definitions of Terms Specific to This Standard
1.4 This standard does not purport to address all of the
4.1 air drying—a process of partially drying coal to bring
safety concerns, if any, associated with its use. It is the
moisture near to equilibrium with the atmosphere in the room
responsibility of the user of this standard to establish appro-
inwhichfurtherreductionanddivisionofthesampleistotake
priate safety and health practices and determine the applica-
place.
bility of regulatory limitations prior to use.
4.2 analysis sample—final subsample prepared from the
original gross or divided sample but reduced to 100% through
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This method is under the jurisdiction of ASTM Committee D05 on Coal and
No. 60 (250-µm) sieve and divided to not less than 50 g.
Coke and is the direct responsibility of Subcommittee D05.23 on Sampling.
Current edition approved June 10, 2000. Published September 2000. Originally
published as D2013–62T. Last previous edition D2013–86(1994).
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For more detailed explanation of this method see Keller, G. E., “Determination Annual Book of ASTM Standards, Vol 05.06.
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of Quantities Needed in Coal Sample Preparation andAnalysis,” Transactions,Vol Discontinued; see 1988 Annual Book of ASTM Standards, Vol 05.05.
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232, 1965, pp. 218–226. Annual Book of ASTM Standards, Vol 14.02.
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D2013–00
4.3 bias (systematic error)—an error that is consistently 5. Summary of Method
negative or consistently positive. The mean of errors resulting
5.1 Three processes of sample division are covered in this
fromaseriesofobservationswhichdoesnottendtowardszero.
method as follows:
4.4 C test—a standard statistical test for homogeneity of
5.1.1 Procedure A—Riffles are used for division of the
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variance.
sample and mechanical crushing equipment for the reduction
4.5 divided sample—a sample that has been reduced in
of the sample.
quantity.
5.1.
...