ASTM D3242 Standard Test Method for Acidity in Aviation Turbine Fuel
11. Report
11.1 Report the result to the nearest 0.001 mg KOH/g as Acid Number (Test Method D3242) = (Result).
12. Precision and Bias
12.1 Precision - The precision of this test method as determined by statistical examination of interlaboratory results is as follows:
12.1.1 Repeatability - The difference between two test 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 (see Table 1).
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, in the normal and correct operation of the test method, exceed the following values only in one case in twenty (see Table 1).
NOTE 6 - The precision statements were based on the use of manual burets only. The user is cautioned that the precision statements may or may not be applicable to titrations performed with the use of automated burets, since no interlaboratory study has been conducted to date to statistically evaluate results determined by both techniques.
12.2 Bias - The procedure in this test method has no bias because the value of the acid can be defined only in terms of the test method.
13. Keywords
13.1 acidity; aviation turbine fuel
