ASTM D5762 Test Method for Nitrogen in Petroleum and Petroleum Products
ASTM D5762 Standard Test Method for Nitrogen in Petroleum and Petroleum Products by Boat-Inlet Chemiluminescence
13. Precision and Bias
13.1 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 in only one case in twenty, where X = the average of the two test results.
r = 0.087 3 X µg/g
13.2 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 in only one case in twenty, where X = the average of the two test results.
R = 0.266 3 X µg/g
13.3 Bias - An NIST SRM was analyzed by the cooperators participating in the repeatability and reproducibility determination. This test method showed no significant bias for this sample within the repeatability of this test method.
14. Keywords
14.1 chemiluminescence; nitrogen