ASTM D20 Standard Test Method for Distillation of Road Tars
10. Report
10.1 Report the following information:
10.1.1 The results of the distillation test as percentages to the nearest 0.1 %, based on the mass of water-free material. For road tars, it is customary to report the total distillate to a series of temperatures corresponding to the maxima specified for the fractions.
11. Precision
11.1 The following criteria should be used for judging the acceptability of results at the 95 % probability level:
11.1.1 Repeatability - Duplicate results by the same operator should be considered suspect if the reported percentage differs by more than the "r" value listed in Table 2.
11.1.2 Reproducibility - Results submitted by two laboratories should be considered suspect if the reported percentage differs by more than the "R" value listed in Table 2.
NOTE 2 - The precision limits given only apply to fractions having greater than 2.0 % distillate.
12. Keywords
12.1 distillation; road tar