ASTM D6733 Standard Test Method for Determination of Individual Components in Spark Ignition Engine Fuels by 50-Metre Capillary High Resolution Gas Chromatography
14. Report
14.1 Report the content of each component as % (m/m) to the nearest 0.01 %.
15. Precision
15.1 Individual Components - The precision of this test method was determined by a statistical analysis of interlaboratory test results. It applies only to a range from 0.1 to 15 % (m/m), for all components with a resolution greater than 1.0 and without co-elution with oxygenate components. When two components of the same hydrocarbon type have a resolution less than 1.0, the precision can be applied by adding the concentration of two components. The precision is the same for all: (a) light components (saturates and olefins) with a carbon number of 4 and 5, (b) saturates and olefins with a range of carbon number from 6 to 12, and to (c) aromatics. This precision is as follows:
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 material, in the normal and correct operation of the test method, would exceed the value given in the Table 3 in only one case in twenty.
15.1.2 Reproducibility - The difference between two single and independent results, obtained by different operators in different laboratories on nominally identical test material, in the normal and correct operation of the test method, would exceed the values given in the Table 3 in only one case in twenty.
16. Keywords
16.1 detailed hydrocarbon analysis; DHA; gas chromatography; gasoline; hydrocarbons; open tubular; oxygenates; spark ignition engine fuels
