ASTM-D2013:2012 Edition

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D2013/D2013M-12 Standard Practice for Preparing Coal Samples for Analysis

Published By	Publication Date	Number of Pages
ASTM	2012	12

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Category: ASTM

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Description

1.1 This practice covers the reduction and division of gross or divided samples, and the preparation of composite 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 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

1.4 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.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Summary of Practice
2	Significance and Use Apparatus Precautions
3	FIG. 1
4	Sieve Tests Procedure FIG. 2
5	FIG. 3 TABLE 1
6	FIG. 4
7	Preparation of Composite Samples to Represent Lot-Size (or Consignment-Size) Quantities of Coal TABLE 2
8	Precision and Bias Keywords A1. METHOD OF CHECKING THE PRECISION OF SAMPLE PREPARATION AND ANALYSIS A1.1 Scope A1.2 Procedure
9	A1.3 Calculation
10	TABLE A1.1
11	A2. METHOD FOR DETERMINING THE OVERALL VARIANCE OF DIVISION AND ANALYSIS A2.1 Scope A2.2 Procedure
12	TABLE A2.1