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ASTM-D4821:2006 Edition

ASTM-D4821:2006 Edition

$40.63

D4821-06 Standard Guide for Carbon Black-Validation of Test Method Precision and Bias

Published By Publication Date Number of Pages
ASTM 2006 7
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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.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Significance and Use
2 Procedure for Continuously Monitoring Testing
TABLE 1
3 Procedure for Continuously Monitoring Testing Using SRB Normalized Data
4 FIG. 1
5 Assignable Causes
FIG. 2
TABLE 2
6 Guide to Accepted Normalization Practices for Carbon Black Test Methods
Report
FIG. 3
7 Precision and Bias
Keywords

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