11. Report
11.1 Report the total sediment by hot filtration as the average of duplicate determinations, to the nearest 0.01 % m/m. If the average of the duplicate determinations is <0.01 % m/m, report it as "<0.01 % m/m". If a 5-g sample has been used, report the results as total sediment (5 g) by hot filtration. If filtration is not complete within the specified 25 min, report the results as filtration time exceeds 25 min.
11.2 Test Report - The test report shall contain at least the following information:
11.2.1 The type and identification of the product tested,
11.2.2 A reference to this test method,
11.2.3 The result of the test (see 11.1),
11.2.4 Any deviation, by agreement or otherwise, from the standard procedures specified (see 11.1), and
11.2.5 The date of the test.
12. Precision and Bias
12.1 Precision - The precision of this test method as determined by the statistical examination of interlaboratory test results is as follows. The results ranged from 0.01 to 0.40 % m/m for distillate fuel oils containing residual components and from 0.01 to 0.50 % m/m for residual fuel oils.
12.1.1 Repeatability - The difference between successive test results, expressed as the average of duplicate determinations, 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:
where x = the average of the test results, % m/m.
12.1.2 Reproducibility - The difference between two test results, expressed as the average of duplicate determinations independently obtained by different operators operating in different laboratories on nominally identical test material would, in the long run, in the normal and correct operation of the test method, exceed the following values only one case in twenty:
where x = the average of the test results, % m/m.
12.2 Bias - Since there is no accepted reference material suitable for determining the bias for the procedure in this test method, bias cannot be determined.
13. Keywords
13.1 ageing; fuel oils; hot filtration; residual fuel; sediment; storage stability; total sediment