ASTM D5442 Test Method for Analysis of Petroleum Waxes by Gas Chromatography
13. Report
13.1 Report the concentration in mass percent of the normal (Ni) and non-normal (NONi) hydrocarbons for each carbon number in the sample to the nearest 0.01 mass percent. Report also the amount of residual as % C45+.
14. Precision and Bias
14.1 Precision - The precision of this test method as determined by statistical examination of interlaboratory test results is as follows:
14.1.1 Repeatability - The difference between the 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 values in Table 2 only in one case in twenty.
14.1.2 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 values in Table 2 only in one case in twenty.
14.2 Bias - Bias cannot be determined because there is no reference material suitable for determining the bias of the procedure in this test method.
15. Keywords
15.1 gas chromatography; non-normal paraffin hydrocarbons; normal paraffin; paraffin wax; petroleum wax
