ASTM D6730 Test Method for Individual Components in Spark Ignition Engine Fuels
ASTM D6730 Standard Test Method for Determination of Individual Components in Spark Ignition Engine Fuels by 100-Metre Capillary (with Precolumn) High-Resolution Gas Chromatography
16. Report
16.1 Report the concentration of each component as mass %, % (m/m), to the nearest 0.001 % (m/m).
16.2 These individual component data may be grouped by summing the concentration of compounds in each particular group type such as paraffin, isoparaffin, olefin, aromatic, naphthene, oxygenates, and unknowns. Commercially available software may be used to provide this function, as well as calculation of other properties of petroleum liquids. See the caution in 5.3.
17. Precision and Bias
17.1 Repeatability - The difference in two test results obtained by the same operator with the same apparatus in a given laboratory under constant operating conditions on test samples taken from the same laboratory sample should, in the long run, in the normal and correct operation of the test method not exceed the values given in Table 4 and Table A1.3 for the gasoline components.
17.2 Reproducibility - The difference between two single and independent measurements on test samples taken from the same bulk sample should, in the long run, in the normal and correct operation of the test method, not exceed the values given in Table 4 and Table A1.3 for the gasoline components.
17.3 Bias - No information can be presented on the bias of the procedure in this test method for measuring hydrocarbon concentrations because no material having an accepted reference value is available.
18. Keywords
18.1 detailed hydrocarbon analysis; DHA; gas chromotography; hydrocarbons; open tubular column; oxygenates; PIONA; PONA
