10. Report
10.1 Report results to the nearest 0.001 % as the mass percent of sediment by membrane filtration. The test report shall reference this Test Method D4807 as the procedure used.
11. Precision and Bias
11.1 Repeatability - The difference between successive 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 test method, exceed the following values in only one case in twenty (see Table 1).
where X is sample mean
11.2 Reproducibility - The difference between two single and independent results obtained by different operations 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).
where X is sample mean
11.3 Bias - The data generated during the development of this test method showed that more sediment is recovered from crude oil using this test method compared to the results of Test Method D473.
12. Keywords
12.1 apparatus; crude oil; membrane filtration; procedure; reagents; sampling; sediment