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ASTM D4821-06

Historical Revision

Standard Guide for Carbon Black—Validation of Test Method Precision and Bias

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1.1 This guide covers a procedure for using ASTM Standard Reference Blacks (SRBs) to continuously monitor the precision of those carbon black test methods for which standard values have been established. It also offers guidelines for troubleshooting various test methods.

1.2 This guide establishes the x-chart control limits to be used when continuously monitoring those tests listed in Section . Alternatively, these control limits may be used as a basis for comparison to testing precision computed within a laboratory.

1.3 This guide uses statistical control chart methodology as discussed in STP-15-D to determine if a laboratory's test results differ significantly from the accepted values of the SRBs.

1.4 This guide provides a statistical procedure for improving test reproducibility when a laboratory cannot physically calibrate its apparatus to obtain the standard values of the ASTM SRBs, within the ranges given in the precision statement of the test method.

1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

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.


SDO ASTM: ASTM International
Document Number D4821
Publication Date Oct. 1, 2006
Language en - English
Page Count 7
Revision Level 06
Supercedes
Committee D24.61
Publish Date Document Id Type View
Nov. 1, 2020 D4821-20 Revision
Aug. 1, 2019 D4821-19 Revision
July 1, 2016 D4821-16 Revision
Jan. 1, 2015 D4821-15 Revision
June 1, 2014 D4821-14 Revision
Oct. 1, 2007 D4821-07E01 Revision
Oct. 1, 2007 D4821-07 Revision
Oct. 1, 2006 D4821-06 Revision
Dec. 15, 2005 D4821-05 Revision
June 1, 2004 D4821-04 Revision
Dec. 1, 2003 D4821-03A Revision
Jan. 10, 2003 D4821-03 Revision
Dec. 10, 2001 D4821-99 Revision
Dec. 10, 2001 D4821-01A Revision
Dec. 10, 2001 D4821-01 Revision