11. Report
11.1 Calculate the results obtained by combining the separately determined residues as prescribed in Table 2 and report as "X" hour aging characteristics, Test Method D873 as x mg/100 mL or < 1mg/100 mL.
12. Precision and Bias
12.1 The precision of the test method as determined by the statistical examination of interlaboratory test results is as follows:
12.1.1 Repeatability - The difference between successive results obtained by the same operator with the same apparatus under constant operating conditions on identical test material would, in the long run, in the normal and correct operation of the test method, exceed the following values only in one case in twenty:
12.1.2 Reproducibility - The difference between two single and independent results obtained by different operators working in different laboratories on identical test material would, in the long run, exceed the following values only in one case in twenty:
12.2 Bias - Since there is no accepted reference material available for determining the bias for the procedure in Test Method D873 for measuring oxidation stability, bias has not been determined.
13. Keywords
13.1 aviation fuels; gum (insoluble, soluble, potential); oxidation stability; potential residue; total potential residue