ASTM D6796 - 02(2008)

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

    Active Standard ASTM D6796 | Developed by Subcommittee: D05.24

    Book of Standards Volume: 05.06


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    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.

    1. Scope

    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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D121 Terminology of Coal and Coke

    D346 Practice for Collection and Preparation of Coke Samples for Laboratory Analysis

    D2013 Practice for Preparing Coal Samples for Analysis

    D2234/D2234M Practice for Collection of a Gross Sample of Coal

    D2492 Test Method for Forms of Sulfur in Coal

    D2961 Test Method for Single-Stage Total Moisture Less than 15 % in Coal Reduced to 2.36-mm (No. 8 Sieve) Topsize

    D3172 Practice for Proximate Analysis of Coal and Coke

    D3173 Test Method for Moisture in the Analysis Sample of Coal and Coke

    D3302 Test Method for Total Moisture in Coal

    D4596 Practice for Collection of Channel Samples of Coal in a Mine

    D5142 Test Methods for Proximate Analysis of the Analysis Sample of Coal and Coke by Instrumental Procedures

    D5263 Test Method for Determining the Relative Degree of Oxidation in Bituminous Coal by Alkali Extraction

    E178 Practice for Dealing With Outlying Observations

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

    E826 Practice for Testing Homogeneity of a Metal Lot or Batch in Solid Form by Spark Atomic Emission Spectrometry


    ICS Code

    ICS Number Code 75.160.10 (Solid fuels)

    UNSPSC Code

    UNSPSC Code 15101601(Coal); 15101604(Coke)


    DOI: 10.1520/D6796-02R08

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