ASTM D2416 Test Method for Coking Value of Tar and Pitch (Modified Conradson)
11. Report
11.1 Report the coking value to the nearest 0.1 wt %.
12. Precision
12.1 The following criteria shall be used for judging the acceptability of results (95 % probability):
12.1.1 Repeatability - Duplicate values by the same operator shall not be considered suspect unless the determined percentages differ by more than 1.0.
12.1.2 Reproducibility - The values reported by each of two laboratories, representing the arithmetic average of duplicate determinations, shall not be considered suspect unless the reported percentages differ by more than 2.0.
13. Keywords
13.1 coking value; conradson
