ASTM-D6796 Historical Revision Information
Standard Practice for Production of Coal, Coke and Coal Combustion Samples for Interlaboratory Studies

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Standard Practice for Production of Coal, Coke and Coal Combustion Samples for Interlaboratory Studies


1.1 This practice describes the essential activities that are required to produce samples for interlaboratory studies.

1.2 The suitability of a particular interlaboratory sample developed using this guide will depend on the tests being made.

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.

Significance and Use

The objective of this practice is to provide guidelines for the preparation of samples for interlaboratory studies to evaluate new test methods or for quality control purposes.

These samples prepared using these guidelines may be used for the testing of the precision and bias mandatory for ASTM test methods. Such an evaluation is necessary to provide guidance to the user as to the reliability of measurements that can be expected by its use. The statements are developed on the basis of user experience (ordinarily through interlaboratory studies) with the test method.

The availability of appropriate samples is a key requirement for interlaboratory studies.

The homogeneity of the sample produced for interlaboratory studies must be small enough so that the variance caused by the sample is small compared to the variance of the test being performed.


ash; coal; coke; combustion residue; homogeneity; laboratory; moisture; oxidation; quality control; Ash; Ash--coal/coke; Coal/coke products; Coal sampling systems; Coke; Combustion residues; Homogeneity; Interlaboratory study (ILS); Laboratory; Moisture analysis--coal/coke; Oxidation; Quality control (QC); ICS Number Code 75.160.10 (Solid fuels)

To find similar documents by ASTM Volume:

05.06 (Gaseous Fuels; Coal and Coke)

To find similar documents by classification:

75.160.10 (Solid fuels Including coal products, coke, peat, wood, derivatives of coal pyrolysis, etc. Coals, see 73.040)

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Document Number


Revision Level

2002 R08 EDITION



Modification Type


Publication Date

March 1, 2008

Document Type


Page Count

6 pages

Committee Number