ASTM D5443 for Paraffin, Naphthene, and Aromatic Hydrocarbon Type Analysis
ASTM D5443 Standard Test Method for Paraffin, Naphthene, and Aromatic Hydrocarbon Type Analysis in Petroleum Distillates Through 200°C by Multi-Dimensional Gas Chromatography
12. Report
12.1 Report the following information:
12.1.1 The mass % and hydrocarbon group type of each group through C11 to the nearest 0.01 %,
12.1.2 The mass % of the fraction boiling above 200°C to the nearest 0.01 %,
12.1.3 The mass % of poly-naphthenes boiling below 200°C (for example, trans-Decahydronaphthalene) to the nearest 0.01 %, and
12.1.4 The C9 and above aromatics as C9+ aromatics to the nearest 0.01 %.
13. Precision and Bias
13.1 Precision - The precision of any individual measurement resulting from the application of this test method depends on several factors related to the individual or group of components including the volatility, concentration and the degree to which the component or group of components are resolved from closely eluting components or groups of components. As it is not practical to determine the precision of measurement for every component or group of components at different levels of concentration separated by this test method, Table 9 presents the repeatability and reproducibility values for selected, representative components and groups of components.
13.1.1 Repeatability - The difference between successive test results obtained by the same operator and 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 9 only one case in twenty.
13.1.2 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 correct operation of this test method, exceed the values shown in Table 9 only one case in twenty.
13.1.3 Bias - Bias is the measurement resulting from the application of this test method cannot be determined since there is no accepted reference material suitable for determining bias.
14. Keywords
14.1 aromatics; gas chromatography; hydrocarbon type; multidimensional; naphthenes; paraffins; petroleum distillates
