ASTM D1839 Standard Test Method for Amyl Nitrate in Diesel Fuels
12. Precision and Bias
12.1 Precision - The precision of this test method as obtained by statistical analysis of interlaboratory test results is as follows:
12.1.1 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 the test method exceed the following value only in one case in twenty:
0.10 volume %
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:
0.10 volume %
12.2 Bias - The bias of this test method cannot be determined since an appropriate standard reference material containing a known level of amyl nitrate in diesel fuel is not available.
13. Keywords
13.1 amyl nitrate; diesel fuel; nitroxylenol; spectrophotometric
