ASTM D6296 Standard Test Method for Total Olefins in Spark-ignition Engine Fuels
ASTM D6296 Standard Test Method for Total Olefins in Spark-ignition Engine Fuels by Multi-dimensional Gas Chromatography
13. Report
13.1 Report the volume % or mass %, or both, for the total olefins to the nearest 0.1 %.
14. Precision and Bias
14.1 Precision - The precision of this test method as determined by the statistical examination of the interlaboratory test results is as follows:
14.1.1 Repeatability - The difference between successive 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 calculated by the following equation only in one case in twenty (see Table 5).
Repeatability = 0.074 x X(0.72)
where X is the average of two results in volume %.
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 correct operation of the test method, exceed the values calculated by the following equation only in one case in twenty (see Table 5).
Reproducibility = 0.26 x X(0.72)
where X is the average of two results in volume %.
14.2 Bias - No information can be presented on the bias of the procedure in Test Method D6296 for measuring total olefin content because no material having an accepted reference value is available.
15. Keywords
15.1 gas chromatography; gasoline; multi-dimensional gas chromatography; olefins; spark-ignition engine fuels
