ASTM D5134 Standard Test Method for Detailed Analysis of Petroleum Naphthas
ASTM D5134 Standard Test Method for Detailed Analysis of Petroleum Naphthas through n-Nonane by Capillary Gas Chromatography
14. Report
14.1 Report the mass percent and identity of each component through n-nonane to the nearest 0.01 %.
14.2 Report the mass percent of C10+ to the nearest 0.01 %.
14.3 Report the total mass percent of all unidentified components through n-nonane.
15. Precision and Bias
15.1 Precision - The precision of any individual measurement resulting from the application of this test method depends on several factors including the volatility of the component, its concentration, and the degree to which it is resolved from other closely eluting components. As it is not practical to determine the precision of measurement for every component (or group of components) separated by this test method, Table 3 presents the repeatability and reproducibility values for selected, representative components.
15.1.1 Repeatability - The difference between successive test results obtained by the same operator with the same apparatus under constant operating conditions on identical test materials would, in the long run, in the normal and correct operation of the test method, exceed the repeatability values shown in Table 3 only in one case in twenty.
15.1.2 Reproducibility - The difference between two single and independent test 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 shown in Table 3 only in one case in twenty.
15.2 Bias - Bias in the measurements resulting from the application of this test method cannot be determined since there is no accepted reference material suitable for determining bias.
16. Keywords
16.1 alkylate; capillary gas chromatography; hydrocarbon composition; petroleum naphtha; reformate
