ASTM D6591 Standard Test Method for Determination of Aromatic Hydrocarbon Types in Middle Distillates - High Performance Liquid Chromatography Method with Refractive Index Detection
12. Report
12.1 Report MAH, DAH, T+AH, POLY-AH and total aromatic hydrocarbon contents to the nearest 0.1 % m/m.
12.2 Report the following information in the test report:
12.2.1 A reference to Test Method D6591;
12.2.2 The type and identification of the product tested;
12.2.3 The result of the test (see Section 11);
12.2.4 Any deviation, by agreement or otherwise, from the procedure specified; and
12.2.5 The date of the test.
13. Precision and Bias
13.1 Precision - The following criteria should be used for judging the acceptability of results (95 % probability):
13.1.1 Repeatability - The difference between two results obtained by the same operator on 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 given in Table 2 only in one case in twenty.
13.1.2 Reproducibility - The difference between two single and independent results obtained by different operators working in different laboratories on identical test materials would, in the long run, in the normal and correct operation of the test method, exceed the following values given in Table 2 only in one case in twenty.
13.1.3 Bias - No information can be presented on the bias of the procedure in Test Method D6591 for measuring aromatic hydrocarbon types in middle distillates because no material having an accepted reference value is available.
14. Keywords
14.1 aromatic hydrocarbons; aromatics; diesel fuel; high performance liquid chromatography; hydrocarbon types; petroleum distillates; refractive index detection; total aromatics in fuel
